Easynote freezes, BSOD. Video card problem.

Hi all,

I have a big problem with my Packard Bell EasyNote notebook. I don't know where should I start...

First of all, the problems started about 8 months ago. I was playing on my computer (with Minecraft), and suddenly the system freezed. From that point, the system can't boot always, or if it successfully booted, just freezes again, or shutdown with BSOD. After 1-2 months, I called the service about the guarantee. They sent my laptop to the centre of the Acer service, to Czech Republic. It took one month to repair my laptop. Anyway, I got my laptop with no problems and crashes...for a little time. I think the problems came again when I newly began playing Minecraft. But the guarantee has expired, so these problems are my problems now. I've searched on the Google a lot, but I didnt find any useful things. (In the service, the specialists are changed the hard drive) I've tryed to search to that texts what the Blue Screen writes me for example "failure with atikmdag.sys" etc.. I've recognized that this is a video card problem. I've tried to update my drivers..nothing, if I delete display drivers, there aren't any issues with the notebook, but it isnt a sollution.

A few days ago, I updated my Windows 7 to Windows 8, but there is no change.

Do you have any ideas what should I do? I don't want to change my video card...