it says ati radeon family has stopped. I'm on windows 7, don't use it for gaming. I have two small screens on it though, one is just looped playing a basic video all the time (it has been running no problem up till now)
Ah,that makes a difference than if it was a desktop.That is why it is important to supply as much info as you can in your opening thread.
I am a desktop man and know little of laptops. But you say it was running fine and the problem has just begun. If it were a desktop I would say check fans for dust and update driver but with a laptop I have no idea, sorry.
FWIW, my son runs a GTX560 (i.e. NVIDIA rather than ATI/AMD), and sees this occasionally also. It is sufficiently momentary in nature that we've never tried to fix it: he suspects it is application-dependent (i.e. it just happens at certain times in the games he plays).