http://msdn2.microsoft.com/en-us/library/aa970683.aspx http://msdn2.microsoft.com/en-us/library/aa969767.aspx

When I run VSTS Loadtest on XP machine, I can get the remote computers' performance counter just by accessing their C drives. But, if you run VSTS loadtest on Vista, maybe you'll find that you cannot access their performance counters. This is not resolved...

download netmon3 here: http://www.microsoft.com/downloads/details.aspx?FamilyID=aa8be06d-4a6a-4b69-b861-2043b665cb53&DisplayLang=en and if you don't run it elevated, you'll see the error message as follows when you click the play button: ...