Werid Graphics on my Terrain.. :(

I was checking if the game would run on my pc, with my friends game, and it did fine, apart from a little slowness, and these werid "sqaures" on the terrain! Any idea how to get rid of these?

http://upl.silentwhisper.net/uplfol...load7/gw001.jpg

and also

http://upl.silentwhisper.net/uplfol...load5/gw002.jpg

Tried lowering my terrain settings, no luck =/

eek help! =)

Any answers here?

Post computer specs and whatnot up for us as well.

Thanks wavey_davey.

yay! my friend came over and downloaded the newest drivers, so I think its cleared it up! thanks anyways ^^