Summary:  You may need to rebuild your WMI.  Steps on how to do this is below:

1) Start the computer and press F8 on boot up and select Safe Mode.

2) In the start menu type "cmd(without quotes) and on the top search result, right click the program icon and choose Run as administrator

3) Type "net stop winmgmt" (without quotes) and press Enter to make certain the WindowsManagementInstrumentation (WMI) service is not running.

4) Open a Windows Explorer and locate the path to C:\ windows\system32\WBEM\ folder and rename the Repository folder to something else like RepositoryOLD (right click and choose 'Rename Folder').

5) Reboot and restart as normal.

6) In the start menu type "cmd"(without quotes) and on the top search result, right click the icon and choose Run as administrator

7) Type "net stop winmgmt" (without quotes) and press enter to stop the WMI service.

8) Type "winmgmt /resetRepository" (without quotes) and restart the computer.

 

Reference Microsoft link is:   

http://social.technet.microsoft.com/Forums/en-US/itprovistasetup/thread/11d6d64e-543b-40cd-a0f6-ba97c3806fbb/