Open Administrative Tools in Control Panel. Click on Services. Scroll down to WMI, double click it and look at the Dependencies tab.
Why it's slowing your system down, I don't know.
Off late, my computer was taking extreme long startup time (upto 35-40 mins). I went into start-up services through msconfig and disabled all services. Then I enabled each service one by one and finally found the culprit. I have three instances of WMI in the list of services. I have enabled WMI (appearing only as Windows management instrumentation) and disabled WMI driver extension and WMI performance adapter. The start up time is now back to normal.
Can anyone tell me what the disabled services (WMI driver extension and WMI performance adapter) are for and why they take so long time if enabled? Possible infection? IF I run without these services being loaded on startup would I have any problems?