User Access Control Settings gets reset and the UAC settings window fails to open on Windows 2008
I've been seeing this problem a lot, recently. The User Access Control settings are getting reset after I reboot my server. When I start any application on Windows 7 or Windows 2008R2 (SP1), I get the UAC window asking me permission to allow the application to run on the computer. Clicking on "Change when these notifications appear" link does not open the UAC settings window. Even if I try to open it from Control Panel -> System and Security screen, I see the same issue.
Source: Microsoft Technet
Looking at the Event Viewer, I see the following error message
Clearly something is wrong with the processing of the local policy. When I try doing the force update from the cmd prompt (c:\>gpupdate /force), I see the same error
Searching Microsoft's Technet, I found the solution. The problem was with corrupt local policy file registry.pol located at C:\Windows\System32\GroupPolicy\Machine (you will have to enable the "Show hidden folders" folder option to see it).
I renamed the registry.pol to registry.old and ran the force update again and guess what?!, the issue got fixed. I was able to change my UAC settings and it never reset after reboot.