There is a setting in Windows (exact location escapes me right now) that allows you to turn off "Show Windows Content While Dragging". It is in one of the appearance or graphics options menus. I suggest you turn that off then try it. While you're at it, I would also shut off those ugly transition effects. They look like crap and take up video ram. My 2 cents.
Sorted it. Turned out the idiot didn't load the drivers on there even after asking him twice if he had. Ended up deleting the partition and re-doing it before he realised he hadn't. Tut. All working fine now, thanks for your help.