How to rebuild the WMI in Win7

Try repairing and rebuilding the WMI service...

Click on start>Run>cmd

On the command prompt run the below steps in order

1. net stop winmgmt 
then go to the C:\Windows\system32\wbem directory and delete the Repository directory

2. net start winmgmt

3. cd /d %windir%\system32\wbem
4. for %i in (*.dll) do RegSvr32 -s %i
5. for %i in (*.exe) do %i /RegServer

and 

6. cd /d %windir%\sysWOW64\wbem
7. for %i in (*.dll) do RegSvr32 -s %i
8. for %i in (*.exe) do %i /RegServer


reboot and let me know ...

NOTE: A word of advice... Rebuilding the WMI repository will most probably result in some 3rd party products not working until their setup is re-run & their MOF re-added back to the repository.