i thought i forgot to mention it, that it might be the graphics card, i just wanted to see is it worth putting it on instead of xp, so i used virutal pc
Do you use Microsoft Virual PC 2007? If yes and you have 1024mb ram it is preconfigured to use the half of it for not causing problems. Aero does not work on 512mb ram or better It is disabled you can enable it by making a change at the regisrty :
I would lead you to a more specific search but lack of time :