Hi, Coming along to this thread late because I've seen this error for a long time, but ignored it pretty much as it's a harmless warning. MS have published a KB on the issue here http://support.microsoft.com/kb/950375 I also strongly recommend you don't follow the previous advice in this thread about deleting the WMI repository or you can end up with a load of other things not working properly, for instance office activation. There's some details on that here http://blogs.technet.com/b/askperf/archive/2009/04/13/wmi-rebuilding-the-wmi-repository.aspx