# Inventory Scan failure - WMI Service is Down / Disabled

## Problem

You are unable to proceed with manual / scheduled Inventory Scanning and you get an error **"WMI Connection Failed" / "Asset Scan Locked"** during the process.

## Cause

**Note:** If you encounter the error message **"Asset Scan is Locked,"** it indicates that `dcinventory.exe` has likely crashed. Please reach out to [support](mailto:endpointcentral-support@manageengine.com) for further assistance.

You will encounter this error due to one or more of the following reasons:

- Client machine is too slow due to reasons like high CPU/Memory utilization.
- WMI is not configured properly.
- WMI repository corrupted.
- WMI Service Disabled

## Resolution

1. [To check if WMI Service is running](#to-check-if-wmi-service-is-running)
2. [To check if WMI Repository is corrupted](#to-check-if-wmi-repository-is-corrupted)
3. [To perform a repair/re-sync of the WMI repository](#to-perform-a-repairre-sync-of-the-wmi-repository)
4. [To rebuild your WMI repository](#to-rebuild-your-wmi-repository-follow-the-below-steps)

### To check if WMI Service is running:

- Open **Services** and check the **Windows Management Instrumentation** status is **Running** and startup type is **Automatic**.

### To check if WMI Repository is corrupted:

- Run:

```
wbemtest
```

![WMI repository is corrupted step 1](https://www.manageengine.com/products/desktop-central/images/wmi1.png)

- Connect to namespace **root\cimV2**

![WMI repository is corrupted step 2](https://www.manageengine.com/products/desktop-central/images/wmi2.png)

- Select **Query** and enter:

```
Select * from Win32_operatingsystem
```

![WMI repository is corrupted step 3](https://www.manageengine.com/products/desktop-central/images/wmi3.png)

- The above image depicts a healthy WMI repository.
- In case an error occurs in `wbemtest`, then rebuild / repair / resync the WMI repository.

### To perform a repair/re-sync of the WMI repository

Run the following commands in **Command Prompt as administrator** on the machine being monitored:

**For Windows XP and Windows 2000 Servers:**

- To clear the WMI performance counter settings:

```
winmgmt /clearadap
```

- To stop the WMI Service:

```
winmgmt /kill
```

- To unregister the WMI service:

```
winmgmt /unregserver
```

- To register the WMI service:

```
winmgmt /regserver
```

- To re-synchronize performance counters:

```
winmgmt /resyncperf
```

**For Windows 2003 Servers:**

- To recompile all MOF files:

```
wmiadap.exe /c
```

- To reload the performance library and rebuild the performance counters:

```
wmiadap.exe /f
```

- To reload all performance counters and their settings from the Windows registry:

```
lodctr /R
```

- For Windows 7 and later versions, and Windows Server 2008:

```
winmgmt /salvagerepository
```

### To rebuild your WMI repository follow the below steps

- Open **Services**, locate the **Windows Management Instrumentation** service. Set the Startup Type to **Disabled** and **Stop** the service.
- Remove or rename the **Repository** folder from the path:

```
C:\Windows\System32\wbem\
```

- Once you have removed or renamed the Repository folder, set the Startup Type as **Enable** and **Start** the **Windows Management Instrumentation** service.
- Open **Command Prompt as Administrator** and execute the following commands:

1. 

```
cd C:\Windows\System32\wbem\
```

2. 

```
for /f %s in ('dir /b *.mof') do mofcomp %s
```

Kindly note that the above command will take a minute or so to complete. Once completed proceed with the below command.

3. 

```
for /f %s in ('dir /b en-us\*.mfl') do mofcomp en-us\%s
```

- Open Performance Monitor to verify that all counters can be loaded.

**Note:** If you encounter an error in Performance Monitor, refer to the [Microsoft KB](https://learn.microsoft.com/en-us/troubleshoot/windows-server/performance/manually-rebuild-performance-counters) document for assistance.

## Verification

After completing all the steps, verify if the WMI service is running in Services.

- If the service is running, change the startup type to **Automatic**.
- Restart the WMI service to proceed with asset scan.

If the above settings are already configured:

- Press **Windows + R** to open the Run dialog and enter:

```
wbemtest
```

- Click **Connect** and select **Query**.
- Execute the query:

```
Select * from Win32_operatingsystem
```

- If this works, resume your inventory scan operation.