SQL Server WMI Error
If SQL Server Configuration Manager will not open, more than likely WMI is corrupt on the server. Specifically the WMI that queries SQL Server.
The Fix: recompile the WMI sql mof
mofcomp.exe "C:\Program Files (x86)\Microsoft SQL Server\100\Shared\sqlmgmproviderxpsp2up.mof"
or perhaps
mofcomp.exe "C:\Program Files\Microsoft SQL Server\100\Shared\sqlmgmproviderxpsp2up.mof"
if the server is thus configured.