| S.No |
Patch Description |
Bulletin id |
Severity |
| 1 | Windows 8.1 Update 1 for (KB2919355) | MS14-018 | Critical |
| 2 | Windows 8.1 Update (KB2932046) | MS14-018 | Critical |
| 3 | Windows 8.1 Update (KB2934018) | MS14-018 | Critical |
| 4 | Windows 8.1 Update (KB2937592) | MS14-018 | Critical |
| 5 | Windows 8.1 Update (KB2938439) | MS14-018 | Critical |
| 6 | Security Update for Windows 8.1 (KB2928120) | MS14-025 | Important |
| 7 | Security Update for Windows 8.1 (KB2961899) without KB2919355 | MS14-025 | Important |
| 8 | Security Update for Windows 8.1 (KB2957189) | MS14-031 | Important |
| 9 | Security Update for Windows 8.1 (KB2978742) | MS14-043 | Critical |
| 10 | Security Update for Windows 8.1 (KB2993651) | MS14-045 | Important |
| 11 | Security Update for Windows 8.1 (KB3010788) | MS14-064 | Important |
| 12 | Security Update for Windows 8.1 (KB3003743) | MS14-074 | Important |
| 13 | Security Update for Windows 8.1 (KB2982998) | MS14-076 | Important |
| 14 | Security Update for Windows 8.1 (KB3020393) | MS15-002 | Critical |
| 15 | Security Update for Windows 8.1 (KB3021674) | MS15-003 | Important |
| 16 | Security Update for Windows 8.1 (KB3019978) | MS15-004 | Important |
| 17 | Security Update for Windows 8.1 (KB3022777) | MS15-005 | Important |
| 18 | Security Update for Windows 8.1 (KB3004365) | MS15-006 | Important |
| 19 | Security Update for Windows 8.1 (KB3000483) | MS15-011 | Critical |
| 20 | Security Update for Windows 8.1 (KB3004361) | MS15-014 | Important |
| 21 | Security Update for Windows 8.1 (KB3030377) | MS15-028 | Important |
| 22 | Security Update for Windows 8.1 (KB3035126) | MS15-029 | Important |
| 23 | Security Update for Windows 8.1 (KB3042553) | MS15-034 | Critical |
| 24 | Security Update for Windows 8.1 (KB3045685) | MS15-038 | Important |
| 25 | Security Update for Windows 8.1 (KB3055642) | MS15-050 | Important |
| 26 | Security Update for Windows 8.1 (KB3059317) | MS15-060 | Important |
| 27 | Security Update for Windows 8.1 (KB3061512) | MS15-069 | Important |
| 28 | Security Update for Windows 8.1 (KB3072630) | MS15-074 | Important |
| 29 | Security Update for Windows 8.1 (KB3075220) | MS15-082 | Important |
| 30 | Security Update for Windows 8.1 (KB3076895) | MS15-084 | Important |
| 31 | Security Update for Windows 8.1 (KB3071756) | MS15-085 | Important |
| 32 | Security Update for Windows 8.1 (KB3046017) | MS15-088 | Important |
| 33 | Security Update for Windows 8.1 (KB3076949) | MS15-089 | Important |
| 34 | Security Update for Windows 8.1 (KB3084135) | MS15-102 | Important |
| 35 | Security Update for Windows 8.1 (KB3082089) | MS15-102 | Important |
| 36 | Security Update for Windows 8.1 (KB3086255) | MS15-097 | Critical |
| 37 | Security Update for Windows 8.1 (KB3092601) | MS15-119 | Important |
| 38 | Security Update for Windows 8.1 (KB3102939) | MS15-120 | Important |
| 39 | Security Update for Windows 8.1 (KB3109094) | MS15-128 | Critical |
| 40 | Security Update for Windows 8.1 (KB3108381) | MS15-132 | Important |
| 41 | Security Update for Windows 8.1 (KB3109103) | MS15-133 | Important |
| 42 | Security Update for Windows 8.1 (KB3124001) | MS16-005 | Critical |
| 43 | Security Update for Windows 8.1 (KB3121918) | MS16-007 | Important |
| 44 | Security Update for Windows 8.1 (KB3109560) | MS16-007 | Important |
| 45 | Security Update for Windows 8.1 (KB3110329) | MS16-007 | Important |
| 46 | Security Update for Windows 8.1 (KB3121461) | MS16-007 | Important |
| 47 | Security Update for Windows 8.1 (KB3121212) | MS16-008 | Important |
| 48 | Microsoft Windows Malicious Software Removal Tool (KB890830). Jan 11, 2016 | MSRT-001 | Moderate |
| 49 | Microsoft Windows Malicious Software Removal Tool (KB890830). Feb 09, 2016 | MSRT-001 | Moderate |
| 50 | Security Update for Windows 8.1 (KB3123294) | MS16-012 | Critical |
| 51 | Security Update for Windows 8.1 (KB3115858) | MS16-013 | Critical |
| 52 | Security Update for Windows 8.1 (KB3126587) | MS16-014 | Important |
| 53 | Security Update for Windows 8.1 (KB3126593) | MS16-014 | Important |
| 54 | Security Update for Windows 8.1 (KB3126434) | MS16-014 | Important |
| 55 | Security Update for Windows 8.1 (KB3126041) | MS16-014 | Important |
| 56 | Security Update for Windows 8.1 (KB3124280) | MS16-016 | Important |
| 57 | Security Update for Windows 8.1 (KB3126446) | MS16-017 | Important |
| 58 | Security Update for Windows 8.1 (KB3134214) | MS16-018 | Important |
| 59 | Security Update for Adobe Flash Player for Windows 8.1 (KB3135782) | MS16-022 | Critical |
| 60 | Security Update for Windows 8.1 (KB3140735) | MS16-026 | Critical |
| 61 | Security Update for Windows 8.1 (KB3138910) | MS16-027 | Critical |
| 62 | Security Update for Windows 8.1 (KB3138962) | MS16-027 | Critical |
| 63 | Security Update for Windows 8.1 (KB3137513) | MS16-028 | Critical |
| 64 | Security Update for Windows 8.1 (KB3139940) | MS16-030 | Important |
| 65 | Security Update for Windows 8.1 (KB3139914) | MS16-032 | Important |
| 66 | Security Update for Windows 8.1 (KB3139398) | MS16-033 | Important |
| 67 | Security Update for Windows 8.1 (KB3139852) | MS16-034 | Important |
| 68 | Microsoft Windows Malicious Software Removal Tool (KB890830). Mar 08, 2016 | MSRT-001 | Moderate |
| 69 | Security Update for Adobe Flash Player for Windows 8.1 (KB3144756) | MS16-036 | Critical |
| 70 | Security Update for Windows 8.1 (KB3145739) | MS16-039 | Critical |
| 71 | Security Update for Windows 8.1 (KB3149090) | MS16-047 | Important |
| 72 | Security Update for Windows 8.1 (KB3146723) | MS16-048 | Important |
| 73 | Security Update for Adobe Flash Player for Windows 8.1 (KB3154132) | MS16-050 | Critical |
| 74 | Microsoft Windows Malicious Software Removal Tool (KB890830). Apr 13, 2016 | MSRT-001 | Moderate |
| 75 | Security Update for Windows 8.1 (KB3146706) | MS16-044 | Important |
| 76 | Security Update for Windows 8.1 (KB3156013) | MS16-055 | Critical |
| 77 | Security Update for Windows 8.1 (KB3156016) | MS16-055 | Critical |
| 78 | Security Update for Windows 8.1 (KB3156019) | MS16-055 | Critical |
| 79 | Security Update for Windows 8.1 (KB3155178) | MS16-056 | Critical |
| 80 | Security Update for Windows 8.1 (KB3156059) | MS16-057 | Critical |
| 81 | Security Update for Windows 8.1 (KB3153704) | MS16-061 | Important |
| 82 | Security Update for Windows 8.1 (KB3153199) | MS16-062 | Important |
| 83 | Security Update for Windows 8.1 (KB3156017) | MS16-062 | Important |
| 84 | Security Update for Adobe Flash Player for Windows 8.1 (KB3157993) | MS16-064 | Critical |
| 85 | Security Update for Windows 8.1 (KB3155784) | MS16-067 | Important |
| 86 | Security Update for Windows 8.1 (KB3150220) | MS16-059 | Important |
| 87 | Security Update for Windows 8.1 (KB3153171) | MS16-060 | Important |
| 88 | Microsoft Windows Malicious Software Removal Tool (KB890830). May 11, 2016 | MSRT-001 | Moderate |
| 89 | Security Update for Adobe Flash Player for Windows 8.1 (KB3163207) | MS16-064 | Critical |
| 90 | Security Update for Windows 8.1 (KB3161664) | MS16-073 | Important |
| 91 | Security Update for Windows 8.1 (KB3159398) | MS16-072 | Important |
| 92 | Security Update for Windows 8.1 (KB3164033) | MS16-074 | Important |
| 93 | Security Update for Windows 8.1 (KB3164035) | MS16-074 | Important |
| 94 | Security Update for Windows 8.1 (KB3161561) | MS16-075 | Important |
| 95 | Security Update for Windows 8.1 (KB3161949) | MS16-077 | Important |
| 96 | Security Update for Windows 8.1 (KB3157569) | MS16-080 | Important |
| 97 | Security Update for Windows 8.1 (KB3161958) | MS16-082 | Important |
| 98 | Microsoft Windows Malicious Software Removal Tool (KB890830). Jun 14, 2016 | MSRT-001 | Moderate |
| 99 | Security Update for Adobe Flash Player for Windows 8.1 (KB3167685) | MS16-083 | Critical |
| 100 | Security Update for Windows 8.1 (KB3170455) | MS16-087 | Critical |
| 101 | Security Update for Windows 8.1 (KB3168965) | MS16-090 | Important |
| 102 | Security Update for Windows 8.1 (KB3170377) | MS16-092 | Important |
| 103 | Security Update for Windows 8.1 (KB3169704) | MS16-092 | Important |
| 104 | Security Update for Adobe Flash Player for Windows 8.1 (KB3174060) | MS16-093 | Critical |
| 105 | Security Update for Windows 8.1 (KB3172727) | MS16-094 | Important |
| 106 | Microsoft Windows Malicious Software Removal Tool (KB890830). July 14, 2016 | MSRT-001 | Moderate |
| 107 | Security Update for Windows 8.1 (KB3178034) | MS16-097 | Critical |
| 108 | Security Update for Windows 8.1 (KB3177725) | MS16-098 | Important |
| 109 | Security Update for Windows 8.1 (KB3172729) | MS16-100 | Important |
| 110 | Security Update for Windows 8.1 (KB3167679) | MS16-101 | Important |
| 111 | Security Update for Windows 8.1 (KB3177108) | MS16-101 | Important |
| 112 | Security Update for Windows 8.1 (KB3175887) | MS16-102 | Critical |
| 113 | Microsoft Windows Malicious Software Removal Tool (KB890830). Aug 10, 2016 | MSRT-001 | Moderate |
| 114 | Security Update for Windows 8.1 (KB3185911) | MS16-106 | Important |
| 115 | Security Update for Windows 8.1 (KB3184471) | MS16-110 | Important |
| 116 | Security Update for Windows 8.1 (KB3187754) | MS16-110 | Important |
| 117 | Security Update for Windows 8.1 (KB3175024) | MS16-111 | Important |
| 118 | Security Update for Windows 8.1 (KB3178539) | MS16-112 | Important |
| 119 | Security Update for Windows 8.1 (KB3177186) | MS16-114 | Important |
| 120 | Security Update for Windows 8.1 (KB3184943) | MS16-115 | Important |
| 121 | Security Update for Windows 8.1 (KB3184122) | MS16-116 | Critical |
| 122 | Security Update for Adobe Flash Player for Windows 8.1 (KB3188128) | MS16-117 | Critical |
| 123 | Microsoft Windows Malicious Software Removal Tool (KB890830). Sep 13, 2016 | MSRT-001 | Moderate |
| 124 | October, 2016 Security Only Quality Update for Windows 8.1 (KB3192392) | MS16-123 | Important |
| 125 | Security Update for Adobe Flash Player for Windows 8.1 (KB3194343) | MS16-127 | Critical |
| 126 | Microsoft Windows Malicious Software Removal Tool (KB890830).Oct 11, 2016 | MSRT-001 | Moderate |
| 127 | October, 2016 Security Monthly Quality Rollup for Windows 8.1 (KB3185331) | MS16-124 | Important |
| 128 | Security Update for Adobe Flash Player for Windows 8.1 (KB3201860) | MS16-128 | Critical |
| 129 | November, 2016 Security Only Quality Update for Windows 8.1 (KB3197873) | MS16-130 | Critical |
| 130 | November, 2016 Security Monthly Quality Rollup for Windows 8.1 (KB3197874) | MS16-130 | Critical |
| 131 | Security Update for Adobe Flash Player for Windows 8.1 (KB3202790) | MS16-141 | Critical |
| 132 | Microsoft Windows Malicious Software Removal Tool (KB890830).Nov 08, 2016 | MSRT-001 | Moderate |
| 133 | December, 2016 Security Only Quality Update for Windows 8.1 (KB3205400) | MS16-146 | Critical |
| 134 | December, 2016 Security Monthly Quality Rollup for Windows 8.1 (KB3205401) | MS16-146 | Critical |
| 135 | Security Update for Adobe Flash Player for Windows 8.1 (KB3209498) | MS16-154 | Critical |
| 136 | Microsoft Windows Malicious Software Removal Tool (KB890830).Dec 13,2016 | MSRT-001 | Moderate |
| 137 | Security Update for Adobe Flash Player for Windows 8.1 (KB3214628) | MS17-003 | Critical |
| 138 | Microsoft Windows Malicious Software Removal Tool (KB890830) Jan 10,2017 | MSRT-001 | Moderate |
| 139 | Microsoft Windows Malicious Software Removal Tool (KB890830) Feb 21,2017 | MSRT-001 | Moderate |
| 140 | Security Update for Adobe Flash Player for Windows 8.1 (KB4010250) | MS17-005 | Critical |
| 141 | Cumulative Security Update for Internet Explorer 11 for Windows 8.1 (KB4012204) | MS17-006 | Critical |
| 142 | Cumulative Security Update for Internet Explorer 11 for Windows 8.1 for x64-based Systems (KB4012204) | MS17-006 | Critical |
| 143 | March, 2017 Security Monthly Quality Rollup for Windows 8.1 - WannaCrypt Ransomware Worm(KB4012216) | MS17-006 | Critical |
| 144 | March, 2017 Security Only Quality Update for Windows 8.1 - WannaCrypt Ransomware Worm(KB4012213) | MS17-010 | Critical |
| 145 | Security Update for Adobe Flash Player for Windows 8.1 (KB4014329) | MS17-023 | Critical |
| 146 | Microsoft Windows Malicious Software Removal Tool (KB890830)Mar 14,2017 | MSRT-001 | Moderate |
| 147 | April, 2017 Security Monthly Quality Rollup for Windows 8.1 (KB4015550) | MS17-APR1 | Critical |
| 148 | Security Update for Adobe Flash Player for Windows 8.1 (KB4018483) | MS17-APR6 | Critical |
| 149 | April, 2017 Security Only Quality Update for Windows 8.1 (KB4015547) | MS17-APR7 | Important |
| 150 | Microsoft Windows Malicious Software Removal Tool (KB890830)APRIL 11,2017 | MSRT-001 | Moderate |
| 151 | Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4020821) | MS17-MAY5 | Critical |
| 152 | 2017-05 Security Monthly Quality Rollup Update includes WannaCrypt Fix(MS17-010) and May Month Quality Rollup for Windows 8.1 for x86-based Systems (KB4019215) | MS17-MAY6 | Important |
| 153 | 2017-05 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4019213) | MS17-MAY6 | Important |
| 154 | Microsoft Windows Malicious Software Removal Tool (KB890830) May 9,2017 | MSRT-001 | Moderate |
| 155 | Windows Malicious Software Removal Tool - May 2017 (KB890830) | MSRT-001 | Moderate |
| 156 | 2017-06 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4022726) | MS17-JUN2 | Critical |
| 157 | 2017-06 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4022717) | MS17-JUN2 | Critical |
| 158 | 2017-06 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4022730) | MS17-JUN4 | Critical |
| 159 | Windows Malicious Software Removal Tool - June 2017 (KB890830) | MSRT-001 | Moderate |
| 160 | 2017-07 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4025336) | MS17-JUL2 | Critical |
| 161 | 2017-07 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4025333) | MS17-JUL2 | Critical |
| 162 | 2017-07 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4025376) | MS17-JUL4 | Critical |
| 163 | Windows Malicious Software Removal Tool - July 2017 (KB890830) | MSRT-001 | Moderate |
| 164 | 2017-08 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4034681) | MS17-AUG1 | Critical |
| 165 | 2017-08 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4034672) | MS17-AUG1 | Critical |
| 166 | 2017-08 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4034662) | MS17-AUG3 | Critical |
| 167 | Windows Malicious Software Removal Tool - August 2017 (KB890830) | MSRT-001 | Moderate |
| 168 | 2017-09 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4038792) | MS17-SEP1 | Critical |
| 169 | 2017-09 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4038793) | MS17-SEP1 | Critical |
| 170 | Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4038806) | MS17-SEP3 | Critical |
| 171 | Windows Malicious Software Removal Tool - september 2017 (KB890830) | MSRT-001 | Moderate |
| 172 | 2017-10 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4041687) | MS17-OCT1 | Critical |
| 173 | 2017-10 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4041693) | MS17-OCT1 | Critical |
| 174 | Windows Malicious Software Removal Tool - October 2017 (KB890830) | MSRT-001 | Moderate |
| 175 | Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4049179) | MS17-OCT7 | Critical |
| 176 | 2017-11 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4048958) | MS17-NOV1 | Critical |
| 177 | 2017-11 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4048961) | MS17-NOV1 | Critical |
| 178 | 2017-11 Security Only Quality Update for Windows 8.1 for x64-based Systems (KB4048961) | MS17-NOV1 | Critical |
| 179 | Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4048951) | MS17-NOV4 | Critical |
| 180 | Windows Malicious Software Removal Tool - November 2017 (KB890830) | MSRT-001 | Moderate |
| 181 | 2017-12 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4054519) | MS17-DEC1 | Critical |
| 182 | 2017-12 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4054522) | MS17-DEC1 | Important |
| 183 | Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4053577) | MS17-DEC5 | Critical |
| 184 | Windows Malicious Software Removal Tool - December 2017 (KB890830) | MSRT-001 | Moderate |
| 185 | 2018-01 Security Only Quality Update for Windows 8.1 for x86-based Systems - Meltdown and Spectre (KB4056898) | MS18-JAN1 | Important |
| 186 | 2018-01 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems - Meltdown and Spectre (KB4056895) | MS18-JAN1 | Critical |
| 187 | Prerequisite Handler for Meltdown and Spectre | MS18-JAN5 | Critical |
| 188 | 2018-01 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4056887) | MS18-JAN6 | Critical |
| 189 | Windows Malicious Software Removal Tool - january 2018 (KB890830) | MSRT-001 | Moderate |
| 190 | 2018-02 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4074595) | MS18-FEB1 | Critical |
| 191 | 2018-02 Security Only Quality Update for Windows 8.1 for x86-based Systems - Meltdown and Spectre (KB4074597) | MS18-FEB2 | Critical |
| 192 | 2018-02 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems - Meltdown and Spectre(KB4074594) | MS18-FEB2 | Critical |
| 193 | Windows Malicious Software Removal Tool - February 2018 (KB890830) | MSRT-001 | Unrated |
| 194 | Windows Malicious Software Removal Tool - March 2018 (KB890830) | MSRT-001 | Unrated |
| 195 | Windows Malicious Software Removal Tool - April 2018 (KB890830) | MSRT-001 | Unrated |
| 196 | Windows Malicious Software Removal Tool - May 2018 (KB890830) | MSRT-001 | Unrated |
| 197 | Windows Malicious Software Removal Tool - June 2018 (KB890830) | MSRT-001 | Unrated |
| 198 | Windows Malicious Software Removal Tool - July 2018 (KB890830) | MSRT-001 | Unrated |
| 199 | Windows Malicious Software Removal Tool - August 2018 (KB890830) | MSRT-001 | Unrated |
| 200 | Windows Malicious Software Removal Tool - September 2018 (KB890830) | MSRT-001 | Unrated |
| 201 | Windows Malicious Software Removal Tool - october 2018 (KB890830) | MSRT-001 | Unrated |
| 202 | Windows Malicious Software Removal Tool - November 2018 (KB890830) | MSRT-001 | Unrated |
| 203 | Windows Malicious Software Removal Tool - December 2018 (KB890830) | MSRT-001 | Unrated |
| 204 | Prerequisite Handler for Meltdown and Spectre | MS18-JAN5 | Critical |
| 205 | Prerequisite Handler for Meltdown and Spectre | MS18-JAN5 | Critical |
| 206 | 2018-03 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4088785) | MS18-MAR1 | Critical |
| 207 | 2018-03 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4088876) | MS18-MAR2 | Important |
| 208 | 2018-03 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4088879) | MS18-MAR2 | Important |
| 209 | 2018-04 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4093115) | MS18-APR2 | Critical |
| 210 | 2018-04 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4093110) | MS18-APR1 | Critical |
| 211 | 2018-04 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4093114) | MS18-APR7 | Critical |
| 212 | 2018-05 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4103729) | MS18-MAY1 | Critical |
| 213 | Cumulative Security Update for Internet Explorer 11 for Windows 8.1 (KB4103768) | MS18-MAY5 | Critical |
| 214 | 2018-05 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4103715) | MS18-MAY2 | Critical |
| 215 | 2018-05 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4103725) | MS18-MAY6 | Critical |
| 216 | 2018-06 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4287903) | MS18-JUN1 | Critical |
| 217 | 2018-06 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4284878) | MS18-JUN2 | Critical |
| 218 | 2018-06 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4284815) | MS18-JUN6 | Critical |
| 219 | 2018-07 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4338832) | MS18-JULY1 | Critical |
| 220 | 2018-07 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4338824) | MS18-JULY2 | Important |
| 221 | 2018-07 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4338815) | MS18-JULY6 | Important |
| 222 | 2018-08 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4343902) | MS18-AUG1 | Critical |
| 223 | 2018-08 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4343888) | MS18-AUG2 | Critical |
| 224 | 2018-08 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4343898) | MS18-AUG6 | Critical |
| 225 | 2018-09 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4457146) | MS18-SEP1 | Critical |
| 226 | 2018-09 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4457143) | MS18-SEP2 | Critical |
| 227 | 2018-09 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4457129) | MS18-SEP6 | Critical |
| 228 | 2018-10 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4462941) | MS18-OCT2 | Critical |
| 229 | 2018-10 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4462926) | MS18-OCT6 | Critical |
| 230 | 2018-11 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4467694) | MS18-NOV1 | Critical |
| 231 | 2018-11 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4467703) | MS18-NOV2 | Critical |
| 232 | 2018-11 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4467697) | MS18-NOV6 | Critical |
| 233 | 2018-11 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4477029) | MS18-NOV12 | Critical |
| 234 | 2018-12 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4471331) | MS18-DEC1 | Critical |
| 235 | 2018-12 Security and Quality Rollup for .NET Framework 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2 for Windows 8.1 (KB4470639) | MS18-DEC8 | Important |
| 236 | KB4471989 - Security and Quality Rollup for .NET Framework 3.5 for Windows 8.1 (KB4470630) | MS18-DEC8 | Important |
| 237 | 2018-12 Security and Quality Rollup for .NET Framework 4.5.2 for Windows 8.1 (KB4470622) | MS18-DEC8 | Important |
| 238 | 2018-12 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4471322) | MS18-DEC2 | Critical |
| 239 | 2018-12 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4471320) | MS18-DEC6 | Critical |
| 240 | Windows Malicious Software Removal Tool - January 2019 (KB890830) | MSRT-001 | Unrated |
| 241 | 2019-01 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4480979) | MS19-JAN1 | Critical |
| 242 | 2019-01 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4480964) | MS19-JAN2 | Important |
| 243 | 2019-01 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4480963) | MS19-JAN6 | Important |
| 244 | 2019-02 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4487038) | MS19-FEB1 | Critical |
| 245 | 2019-02 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4487028) | MS19-FEB2 | Critical |
| 246 | 2019-02 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4487000) | MS19-FEB6 | Critical |
| 247 | Windows Malicious Software Removal Tool - February 2019 (KB890830) | MSRT-001 | Moderate |
| 248 | 2019-03 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4489907) | MS19-MAR1 | Critical |
| 249 | 2019-03 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4489883) | MS19-MAR2 | Critical |
| 250 | 2019-03 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4489881) | MS19-MAR6 | Critical |
| 251 | Windows Malicious Software Removal Tool - March 2019 (KB890830) | MSRT-001 | Moderate |
| 252 | 2019-04 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4493478) | MS19-APR1 | Critical |
| 253 | 2019-04 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4493467) | MS19-APR2 | Critical |
| 254 | 2019-04 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4493446) | MS19-APR6 | Critical |
| 255 | Windows Malicious Software Removal Tool - April 2019 (KB890830) | MSRT-001 | Moderate |
| 256 | 2019-05 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4497932) | MS19-MAY1 | Critical |
| 257 | 2019-05 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4499165) | MS19-MAY2 | Critical |
| 258 | 2019-05 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4499151) | MS19-MAY6 | Critical |
| 259 | Windows Malicious Software Removal Tool - May 2019 (KB890830) | MSRT-001 | Moderate |
| 260 | 2019-06 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4503308) | MS19-JUN1 | Critical |
| 261 | 2019-06 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4503290) | MS19-JUN2 | Critical |
| 262 | 2019-06 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4503276) | MS19-JUN6 | Critical |
| 263 | Windows Malicious Software Removal Tool - June 2019 (KB890830) | MSRT-001 | Moderate |
| 264 | Windows Malicious Software Removal Tool x64 - June 2019 (KB890830) | MSRT-001 | Moderate |
| 265 | 2019-07 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4507457) (CVE-2019-0880) | MS19-JUL2 | Critical |
| 266 | 2019-07 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4507448) (CVE-2019-0880) | MS19-JUL6 | Critical |
| 267 | 2019-07 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4504418) | MS19-JUL12 | Critical |
| 268 | Windows Malicious Software Removal Tool - July 2019 (KB890830) | MSRT-001 | Moderate |
| 269 | Windows Malicious Software Removal Tool x64 - July 2019 (KB890830) | MSRT-001 | Moderate |
| 270 | 2019-08 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4512489) | MS19-AUG2 | Critical |
| 271 | 2019-08 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4512488) | MS19-AUG6 | Critical |
| 272 | Windows Malicious Software Removal Tool - August 2019 (KB890830) | MSRT-001 | Moderate |
| 273 | Windows Malicious Software Removal Tool x64 - August 2019 (KB890830) | MSRT-001 | Moderate |
| 274 | 2019-09 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4516064) | MS19-SEP2 | Critical |
| 275 | 2019-09 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4516115) | MS19-SEP1 | Critical |
| 276 | 2019-09 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4516067) | MS19-SEP6 | Critical |
| 277 | 2019-09 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4512938) | MS19-SEP12 | Critical |
| 278 | 2019-10 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4524156) | MS19-OCT14 | Critical |
| 279 | 2019-10 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4519990) | MS19-OCT2 | Critical |
| 280 | 2019-10 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4520005) | MS19-OCT6 | Critical |
| 281 | 2019-10 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4521864) | MS19-OCT15 | Critical |
| 282 | Windows Malicious Software Removal Tool - October 2019 (KB890830) | MSRT-001 | Moderate |
| 283 | Windows Malicious Software Removal Tool x64 - October 2019 (KB890830) | MSRT-001 | Moderate |
| 284 | 2019-11 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4525243) | MS19-NOV6 | Critical |
| 285 | 2019-11 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4525250) | MS19-NOV2 | Critical |
| 286 | Windows Malicious Software Removal Tool x64 - November 2019 (KB890830) | MSRT-001 | Moderate |
| 287 | Windows Malicious Software Removal Tool - November 2019 (KB890830) | MSRT-001 | Moderate |
| 288 | 2019-11 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4524445) | MS19-NOV12 | Critical |
| 289 | 2019-12 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4530730) | MS19-DEC2 | Critical |
| 290 | 2019-12 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4530702) | MS19-DEC6 | Critical |
| 291 | Windows Malicious Software Removal Tool x64 - December 2019 (KB890830) | MSRT-001 | Moderate |
| 292 | Windows Malicious Software Removal Tool - December 2019 (KB890830) | MSRT-001 | Moderate |
| 293 | Windows Malicious Software Removal Tool x64 - January 2020 (KB890830) | MSRT-001 | Moderate |
| 294 | 2020-01 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4534309) | MS20-JAN2 | Critical |
| 295 | 2020-01 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4534297) | MS20-JAN6 | Critical |
| 296 | 2020-02 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4537759) | MS20-FEB1 | Critical |
| 297 | 2020-02 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4537821) | MS20-FEB6 | Critical |
| 298 | 2020-02 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4537803) | MS20-FEB2 | Critical |
| 299 | 2020-02 Security Update for Windows 8.1 for x86-based Systems (KB4502496) | MS20-FEB8 | Critical |
| 300 | Windows Malicious Software Removal Tool x64 - February 2020 (KB890830) | MSRT-001 | Moderate |
| 301 | Windows Malicious Software Removal Tool x64 - March 2020 (KB890830) | MSRT-001 | Moderate |
| 302 | 2020-03 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4541505) | MS20-MAR2 | Critical |
| 303 | 2020-03 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4541509) | MS20-MAR6 | Critical |
| 304 | 2020-03 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4540725) | MS20-MAR12 | Critical |
| 305 | Workaround for Font Parsing Remote Code Execution Vulnerability | MS20-MAR25 | Critical |
| 306 | Patch for Undoing the changes of Workaround for Font Parsing Remote Code Execution Vulnerability | MS20-MAR25 | Critical |
| 307 | 2020-04 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4550970) | MS20-APR2 | Critical |
| 308 | 2020-04 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4550961) | MS20-APR6 | Critical |
| 309 | 2020-05 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4556853) | MS20-MAY2 | Critical |
| 310 | 2020-05 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4556846) | MS20-MAY6 | Critical |
| 311 | 2020-05 Update for Windows 8.1 for x86-based Systems (KB4557900) | MS20-MAY13 | Low |
| 312 | Windows Malicious Software Removal Tool x64 - May 2020 (KB890830) | MSRT-001 | Moderate |
| 313 | 2020-06 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4561673) | MS20-JUN2 | Critical |
| 314 | 2020-06 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4561666) | MS20-JUN6 | Critical |
| 315 | 2020-06 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4562253) | MS20-JUN12 | Critical |
| 316 | 2020-06 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4561600) | MS20-JUN1 | Critical |
| 317 | 2020-07 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4565540,KB4569509) (CVE-2020-1350) | MS20-JUL2 | Critical |
| 318 | 2020-07 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4565541,KB4569509) (CVE-2020-1350) | MS20-JUL6 | Critical |
| 319 | 2020-07 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB4566425) | MS20-JUL12 | Critical |
| 320 | 2020-08 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4571723) (CVE-2020-1464) (CVE-2020-1472) | MS20-AUG2 | Critical |
| 321 | 2020-08 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4571703) (CVE-2020-1464) (CVE-2020-1380) (CVE-2020-1472) | MS20-AUG6 | Critical |
| 322 | 2020-08 Security Update for Windows 8.1 for x86-based Systems (KB4578013) | MS20-AUG16 | Critical |
| 323 | 2020-09 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4577071) | MS20-SEP2 | Critical |
| 324 | 2020-09 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4577066) | MS20-SEP6 | Critical |
| 325 | 2020-09 Update for Windows 8.1 for x86-based Systems (KB4566371) | MS20-SEP16 | Low |
| 326 | Windows Malicious Software Removal Tool x64 - September 2020 (KB890830) | MSRT-001 | Moderate |
| 327 | 2020-10 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4580358) | MS20-OCT2 | Critical |
| 328 | 2020-10 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4580347) | MS20-OCT6 | Critical |
| 329 | 2020-10 Security Update for Adobe Flash Player for Windows 8.1 for x86-based Systems (KB4580325) | MS20-OCT1 | Critical |
| 330 | 2020-10 Update for Windows 8.1 for x86-based Systems (KB4578623) | MS20-OCT13 | Low |
| 331 | 2020-11 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4586823) (CVE-2020-17087) | MS20-NOV2 | Critical |
| 332 | 2020-11 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB4586845) (CVE-2020-17087) | MS20-NOV6 | Critical |
| 333 | Windows Malicious Software Removal Tool x64 - November 2020 (KB890830) | MSRT-001 | Moderate |
| 334 | 2020-12 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4592495) | MS20-DEC2 | Important |
| 335 | 2021-01 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4598275) | MS21-JAN2 | Critical |
| 336 | Windows Malicious Software Removal Tool x64 - January 2021 (KB890830) | MSRT-001 | Moderate |
| 337 | 2021-02 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB4601349) | MS21-FEB2 | Critical |
| 338 | Windows Malicious Software Removal Tool x64 - February 2021 (KB890830) | MSRT-001 | Moderate |
| 339 | 2021-03 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB5000853) (CVE-2021-27077) | MS21-MAR2 | Critical |
| 340 | Windows Malicious Software Removal Tool x64 - March 2021 (KB890830) | MSRT-001 | Moderate |
| 341 | 2021-04 Security Only Quality Update for Windows 8.1 for x86-based Systems (KB5001393) (CVE-2021-28437) (CVE-2021-27091) | MS21-APR2 | Critical |
| 342 | 2021-04 Security Monthly Quality Rollup for Windows 8.1 for x86-based Systems (KB5001382) (CVE-2021-28437) | MS21-APR6 | Critical |
| 343 | 2021-04 Servicing Stack Update for Windows 8.1 for x86-based Systems (KB5001403) | MS21-APR12 | Critical |
| 344 | 2021-04 Update for Windows 8.1 for x86-based Systems (KB4601275) | MS21-APR13 | Low |
| 345 | Windows Malicious Software Removal Tool x64 - April 2021 (KB890830) | MSRT-001 | Moderate |
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