Uhhh.... Flashing? I think we'd need more info... Eg. do you mean that the whole screen "Blinks", as-if it had a momentary interruption? Lou.

Edit
I just noticed... sorry... that you are running a DUAL core and 64 bit..... I'm not certain... someone else might have the specific info, but 64 bit may be the problem... I THINK you can set it to run as 32.... wait for someone else who knows more about it, though. Lou

"..... and that was when things got interestiing."