This was about my laptop, by the way.
Problem (kinda) solved.
Apparently World of Warcraft was the only problem game, and it was only while i was running Ventrilo, in Windows Media Center Edition.
I found , through experimentation, that disabling "Use DirectInput for Push-To-Talk Hotkey" in Ventrilo fixed my issue. Huzzah, i no longer need to boot into a stolen copy of XP-pro to do what i need
