How Do I Rebuilt a Corrupt WMI Repository?

The following can be done through a batch file or executed manually from the command line:

net stop winmgmt
c:
cd %systemroot%\system32\wbem
rd /S /Q repository


regsvr32 /s %systemroot%\system32\scecli.dll
regsvr32 /s %systemroot%\system32\userenv.dll


mofcomp cimwin32.mof
mofcomp cimwin32.mfl
mofcomp rsop.mof
mofcomp rsop.mfl
for /f %%s in ('dir /b /s *.dll') do regsvr32 /s %%s
for /f %%s in ('dir /b *.mof') do mofcomp %%s
for /f %%s in ('dir /b *.mfl') do mofcomp %%s
echo DONE reboot
pause

http://msmvps.com/blogs/lduncan/pages/20217.aspx