Links about that at http://www.google.com/search?hl=en&safe=off&q=How+do+I+start+the+Vista+Event+Viewer%3F&btnG=Search

In regards to the WMI error, it would be helpful for a full story about this machine, the trojan that damaged it or the user that was tinkering with services and "more cowbell."

There may be a dependent service but let's note what the stock Services are. I'll give a link but with 5 or more versions of Vista you may have to check into your version and if it matters.

Light reading at http://www.blackviper.com/WinVista/servicecfg.htm