Patch Installation Failure Fatal Error

Problem

A Patch Management deployment fails with Fatal Error during installation.

Cause

This error can occur when:

• the application is running during installation, such as Google Chrome or Microsoft Edge running in the foreground or background;
• Windows Installer requires the original installation source to update or remove an older MSI installation; or
• the failure is specific to the patch or installer.

Resolution

Before choosing a remedy, record the exact patch, application version, installer result and failure time. Preserve vendor setup or verbose MSI logs for MSI-based updates. Use the unknown installer result checks if the reported fatal error does not identify a cause.

On Windows, match the Patch ID, task, execution time, status and full remark in logs\dcpatchinstallaccess.log under the agent installation folder. This execution record does not replace a verbose MSI log.

1. If a running application caused the failure, redeploy only during computer startup. Avoid the combined startup-or-refresh-cycle option if the application can run during refresh cycles.
2. If Windows Installer requests the original package, obtain the exact version and package type it identifies. Make that source available, remove the obsolete installation, run a patch scan, then redeploy the current patch.
3. If the failure persists, reproduce it manually and collect the screenshot and agent logs. Include vendor setup or verbose MSI logs produced by that attempt; their location depends on the installer command and switches. Include %windows%\KB******.log only if the update produces it. Select logs by installer type, not the Microsoft vendor name alone.

For a fatal error from a Software Deployment package rather than a patch, use the Software Deployment troubleshooting guidance instead of this Patch Management article.