I have a new Gateway laptop that I bought about a month ago from Best Buy. It has had this issue of the screen going blank while in use. Sometimes it is like 5 minutes or so before it will do it, and sometimes I will be an hour or two into something and it does it. I have to power the computer completely off to fix it but it happens again and again and again. I uninstalled the ATI graphics driver and downloaded the updated driver from ATI's website for this computer and that seemed to fix it for a couple days but now it's doing the same thing again. I don't have any crazy software on it that would cause this - it is currently running Vista, but I should be receiving my copy of Windows 7 since this is a new computer soon. I am wondering if maybe that will resolve the issue? It seemed to happen only after I installed all the Windows updates when I first got the computer - not straight out of the box. I've reviewed all the Windows updates and I didn't see one that would cause this kind of a problem. I do not think it's the actual hardware of the computer, as my friend has the exact computer and bought it around the same time that I did and his is doing the exact same thing! Does anyone have any suggestions? Any help would be greatly appreciated.