Chinis

Hi all, have a problem I hope you can help fix. My gf's laptop has been messing up a lot lately. She would get a BSoD that had something to do with atiduag3.dll after playing a game for about 30 minutes, but we found some windows update that supposedly fixes it, and it seemed to work fine after that. Now, she's been getting something about IRQL not less or equal to, and she thinks it might have something to do with her vid card too, but isn't really sure, which is why I put it here. Does anyone know what this is? If you need anymore info, just let me know what to do and I'll tell her, thanks in advance, hope you can solve it. :)