I recently build my computer and when I play certain games such as Assassin's creed, and Spiderman Web of Shadows, I get BSOD. I have only got two BSOD so far. The first one is : Fault_in_nonpaged_area Stop: 0x00000050(0xFFFFF880072CFB38,0x000000000000, 0xFFFFF8000319E2BE (i forgot to write down the file that is being affected.) and the second one is System_Service_exception Stop: 0x00000003B(0x000000C00005, 0xFFFFF9600001364BC, 0xFFFFF8803853010 win32k.sys -address FFFFFF960001364BC I've ran memtest86+ for 24 hrs and Prime95 for 12 hrs, both with no errors my drivers are updated and everything. Attached is my minidump files if any one can help me out. my specs : WIndow 7 Ultimate x64 i7 920 XFX ATI 5850 OCZ Gold 6 gb 1600 mhz ddr3 rams 8-8-8-24 Corsair 850 Watts Thank you for your time.