I found a bug with Windows 7 and ATI Catalyst Control Center,
When ever I would remote in to my machine then play any game later on in the day , the game play would be very choppy . The best way to describe it would like , would be the video card hard a “hiccup†every 10 seconds.
I had to restart the CCC.exe process with winternals processes explorer or simply just log off / back on to fix this issue. I never had an issue like this in windows xp/vista. Just putting it out there.