My computer has started to studder playback not only in Nuendo, but also on my desktop when I play music normally. I did a virus scan, nothing. I did Adaware and got rid of some tracking files, nothing. I looked through all the running apps, and nothing out of the normal. Hell I even restarted it a couple of times and still nothing. What might be causing this? It's driving me crazy! I'm running a P4 2Ghz with XP and I have 512 megs of ram. I have tons of HD space left to spare also. It's never done this before, and I can't think of anything I did to make it start.