Hey guys got a huge problem. My pc keeps crashing. It has blue screened, red screened, blank screened etc. I have looked around and it said that if ur pc blue screens or red screens then the prob is either the cpu or gpu. I ran heavyLoad and my core tempts were avg of 60. I ran fur mark 1080 preset and my max tempt was 73. I then ran fur mark again with manual settings for a total of 7 min and tempts seem to plateau at 80. It happens when I am gaming (fifa 16 and Civ :Beyond Earth). Sometimes it blue screens when I am browsing. I understand that blank screens means its psu prob but what about all the rest. Some error msgs: page_fault_in_nonpaged_area (Ntfs.sys) KMODE_EXCEPTION_NOT_HANDLED (usbPORT.SYS) SYSTEM_SERVICE_EXCEPTION (WIN32K.SYS) dRIVER_IRQL_NOT_LESS_OR_EQUAL (ndis.sys) Bad_pool_caller dRIVER_IRQL_NOT_LESS_OR_EQUAL (Wdf01000.sys) I also checked my reliability and problem history and it is at 1 L . There is a cross at miscellaneous failures and the tech details are Description The previous system shutdown at 11:29:56 on 24/12/2015 was unexpected. There is also a windows defender definition update at the same time. Throughout my report everyday there is a windows defender definition update. My Specs: i5 4670k, r9 290 sapphire tri x, 750 watt psu (Cx750), win 8 64 bit Plz help, thx. PS: I have not done any over-clocking. At least to my knowledge. My GPU clock is 1000 and memory clock is 1300 (Taken from Sapphire trixx). A user on toms hardware suggested I should run: Sfc /scannow & Dism /Online /Cleanup-Image /RestoreHealth in admin cmd prompts. I got: Sfc/scannow windows resource protection did not find any integrity violations Dism/.... Deployment Image Servicing and Management tool Version: 6.3.9600.17031 Error:87 The online/cleanup-image/restorehealth is unknown. For more info, refer to the help by running DISM.exe /? I ran seatools on my drives. Did all of the tests except advanced. Got a pass on all of them. FYI I only hav around 7gb on my C drive. I dont believe that has anything to do with my PC's malfunction but I wanted to provide as much info as possible. Blue screened thrice in the last two days while using google chrome. MSgs: Page_fault_in_nonpaged_area Driver_irql_not_less_or_equal System_service_exception(win32.sys) Another bit of info is that I have an old hdd that I scavenged from my sister's laptop attached to my pc. Its done through a usb port. Could that be causing any issue? Just want as much info out there for some1 to come up with a solution. Also my minidump folder is empty.