After i upgraded my nvidia geforce 2 mx-400 drivers, now when i play video xvid or divx-5(DIV3 and DIV5 play well) on media player classic, my CPU goes 100% and it's lagging picture. when i watch those video with VLC, everything goes well. I tried uninstalling new drivers and set up old ones, but this problem won't dissappear. Maybe there's something left from these new drivers? some acceleration or other function, have no idea. can't figure it out. does someone know what the problem could be? thanks.