Blue screen Issue

Ok i restored my pc back to factory condition using Recovery discs i still keep getting blue screen errors .. Windows Diagnostics for memory ..Cpu etc all cambe back as passed.. this only happens when after playing games on gamesgames.com "not sure if this anything to do with it or not" but had never happened up until about 3 wks ago my pc is Windows 7 and only about a year old... seeing i set back to factory conditions because of these blue screens ... my minidump file only has one file which is

012812-20982.01.dmp please help
 
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