Thank you guys for looking into this matter.
I purchased a sony vaio laptop which came preloaded with windows8 and the graphic card AMD radeon HD7650.
Just after purchasing it has been showing problems, like fifa stutters, hot puruit freezes and holes in the map.
My action centre's also showing there is some problem with the graphic card driver.
Also it some time gives a message like graphic card driver crashed and recovered.
what I tried :
Get the newest driver from the amd site - it stopped working at all.
restored my pc - worked like a magic but just for 2 days.
Any help would be greatly appreciated.
I am not clear about the problem,what to do. I am still in warranty.