if y get error Get-ExecutionPolicy : Invalid class try this script :)

x.bat

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