This sounds like a machine that is new and a warranty. Given so little to work with it sounds like a heat related issue. The story is inline with the issue getting worse with time.
Whenever I play games my screen goes black for about 4 or 5 seconds and then comes back on wuth a ballon that says my video driver has crashed, or has quit working, or something simular and the it says that it has recovered. This started out happening about once a week, but has steadily been getting worse to where it happens every day or so. I know VERY little about computers, I used to, but my doctor says I am in the early stages of Dementia and I can tell it. I have a fairly new computer put together by an old pal from way back when and it has a lot of speedy stuff like memory, etc. in it. It has Vista and a Nvidia video card of some kind. Any suggestions? JB2wheeler