Distorted screen. when i play divx files and there is a fast movement in screen some parts of the

Question

when i play divx files and there is a fast movement in screen some parts of the screen seem to lag. Im not talking about the pixelated bad codec artifacts, but it looks like my video card cant handle it or something, it like distorts one half of the screen. Is this a common problem?I use windows mediaplayer classic with all the latest codecs Its a core 2 duo t7100 with an nvidia gforce 8600m gs.thanks in advance,Arjen Klaverstijn