I had the same issue, found this posts when I googled the WMI error. Followed the steps and it was fixed, but please note that I couldn't overwrite the .mof file, event tho' I ran as an admin the notepad and tried to save the original file....anyways, I saved it as .mof.txt and then ran: Mofcomp.exe ClusWMI.mof.txt
tsquillario wrote:Anyone have success in trying the fix above?
I just got SQL Monitor running and this error started for me also. 2 Node Physical 2008R2, SQL 2008 SP3 Cluster.