Looking further I find this post http://groups-beta.google.com/group/micros...3437c5fd11eb27f (sorry about the size of the link but it does work!) Which also mentions that this fix 242975.inf Can also cause this problem Looking at your list of MS fixes this is included in the service pack whereas the one mentioned in my previous post does not. I'm going to remove SP2.0 and see if the problem goes away and take it from there