When we start Server Manager on Server 2012 the flag lights up Red almost immediately with the error:
Configuration refresh failed with the following error: Invalid class.
Please execute the following step to solve the problem.
Open the cmd with administrative right.
1. cd C:\Windows\System32\wbem\AutoRecover
2. for /f %s in ('dir /b *.mof *.mfl') do mofcomp %s
3. Restart the ServerManager consoles.