I recently installed WinXP Pro and my new PNY Geforce 4 Ti4600 card on my 1Ghz Athlon box (512Mb). I've been having problems in Counterstrike and an older game called Sacrifice. Sometimes it will lock up, though most frequently it will just crash to the desktop. When this happens, it usually changes my desktop video mode to the settings that I was playing that game with. Are there any known issues on Geforce 4 cards, or with my Athlon? Does anyone have any suggestions on fixing this most annoying problem?