Full index of Microsoft WMI troubleshooting articles
http://msdn.microsoft.com/en-us/library/msaspx
http://msdn.microsoft.com/en-us/library/aa394603.aspx
http://msdn.microsoft.com/en-us/libraryAa393266.aspx
http://support.microsoft.com/kb/266416
http://support.microsoft.com/kb/300956
http://support.microsoft.com/kb/300702/en-us
http://social.technet.microsoft.com/Forums/windows/en-US/8ed26d46-9994-4052-a307-5b071805aea8/wmi-corrupt-how-to-reinstallrepair
http://support.microsoft.com/kb/951016