Quote Originally Posted by Shaun View Post
a) It's a hardware fault. A piece of your hardware, which could be the RAM or video card maybe, is causing problems.
My advice is this: back up all the data on your computer. Now. Doesn't matter how you get it done - bring it to a shop, use a bootable CD - just get it done.

I agree with Shaun - a piece of hardware is failing inside your PC And if it is the hard disk, then you'd better get your data off there as quickly as possible.