Lately my OS has been a bit... buggy. Sometimes when I'm watching a movie or something, the video feed is very choppy & when I check the task manager, my CPU usage is quite high. After a bit it goes down & my video feed is fine. But about 6 hours later while I'm playing Maple Story, listening to winamp, browsing through some forums & on MSN - my PC begins to lag quite bad. No webpages will continue to load or refresh, my MSN freezes up & I can't even click on my start bar or open up task manager. My specs: Win XP Service Pack 2 Intel P4 2.60ghz 800FSB 4x 512mb DDR400 I don't think anything else matters. Both AVG & AVAST antivirus softwares have detected nothing. I haven't seen anything suspicious or even new on Hijackthis. And Ad-Aware just picks up the same cookie tracker things over & over again. Does anyone have a clue to what could be causing this? Thanks to anyone that can help ^^, I already had to reboot my comp twice today because of this problem.