I addressed other WinMgmt.exe issues at:
If you receive a message similar to Windows Management Instrumentation - WinMgmt could not initialize the core parts, try the following:
1. Open a CMD.EXE prompt.
2. Type the following commands, pressing Enter after each one:
winmgmt /clearadap winmgmt /kill winmgmt /unregserver winmgmt /regserver winmgmt /resyncperf