Sorry for posting like a mad thing lads, but when it comes to PC's i aint too up to date.

Right, I managed to get everything sorted on it (apart from the occasional blue screen of death) but... my screen has this kind of wobbley effect when I grab and drag a screen or scroll a web page, like it is catching up with where i drag it to.

I thought maybe I have the graffix card turned to high, but it aint that... I just can't think of what it is. Any ideas?