Have you changed or updated your graphics card drivers or directx lately?
Try www.guru3d.com
Never actually did this. Apologies after all your help too.
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However, after talkin' to a mate of mine yesterday, he reckons it's probably just some of the pixels not werkin' proper like, and will probably be fixed by downloading something and leaving it to mend itself over approx 12 hours...retuning the pixels or summat?
Is this what your link is all about? had a look, but it's a mighty big web page. Which bit do i need to load?