When you try to start the Automatic Updates service on a computer you may encounter an error stating,
Could not start Automatic Updates service on the local computer. Error 0x8000415: The class is configured to run as a security id different from the caller
I've found that this is usually caused when the service was previously configured as Disabled via Group Policy.
When you configure a service startup mode in Group Policy (Computer Configuration\Windows Settings\Security Settings\System Services), Group Policy first has you configure the security of the service in the registry. The default security settings (before you configure it in the GPO) normally includes Authenticated Users with Read and Start, Stop and Pause permissions. When you configure the service in Group Policy, Authenticated Users have no permissions. This prevents normal users from reconfiguring the service back to Automatic and starting it.
To fix this issue, set the service permissions so that Authenticated Users have Read and Start, Stop and Pause permissions on the service. This can be done the following ways:
- To reconfigure the service in Group Policy, reconfigure the service startup type to Automatic and click the Edit Permissions button. Add Authenticated Users with Read and Start, Startup and Pause permissions. Run GPUPDATE on the client machine or restart it to get the new GPO settings.
- Manually set permissions on the service using Regedit. Navigate to HKLM\SYSTEM\CurrentControlSet\Services\wuauserv. Right-click wuauserv and select Permissions. Add Authenticated Users with Read permissions.
This tip applies to any other service configured via Group Policy.