W wlysix Member Joined May 24, 2014 Posts 7 May 24, 2014 #1 My problems started occurring quite a while back. At first I thought it was my CPU cooler which I had gotten replaced which massively reduced them but still I would receive these blue screens. Now something strange is that a while back the computer would give a blue screen every day but now it's become very random. Sometimes I can do light computing for days (surfing, documents, watching videos) and nothing happens. Other times a random event (opening a gif, a video etc) might set off a blue screen. However, the computer always goes directly to a "machine check exception" error when I run a game. I ran memtest for around 8 hours which didn't produce any memory error. Also diagnosed HDD and didn't find any errors in it.· OS: Windows 7 64-bit Professional · I've always had the same OS, recently reinstalled since I started getting many blue screens · It's a custom configuration made in June 2010 · Age of system (hardware): 2010 · I have re-installed the OS · Intel i7 930 @ 2.8GHZ stock · MSIGeforce GTX 275 currently (Was using Zotac Geforce GTX 670 AMP but sent it for RMA after it was causing overheating issues) · MotherBoard: Gigabyte X58-UD7 Rev 1.0 · CoolerMaster Real Power Pro 1000W · System Manufacturer: Custom Configuration Note about Perfmon report: My computer gives a clock interrupt not received on secondary process so I can never complete the Windows Experience test which might be the reason for the poor ratings. I also have Kaspersky Internet Security (antivirus+firewall) installed. Secondary note: I stopped receiving the "clock interrupt not received on secondary process" after replacing my faulty graphics card and replacing it with my older one. I still get the machine check exception errors when running 3D games. The "clock interrupt" error I got recently when I tried to get the Windows Experience Index score. Very recently the computer has also been locking up for a few seconds and then resuming normally. I also noticed in the Machine Check Exceptions that FFFFF8800(*)c70 address is always present (* being different addresses). Bios at optimized defaults led to the machine being unstable so I had to set the RAM XMP profile for it to stabilize. I suspect I might have a permanently damaged CPU or motherboard but would like a professional opinion on it. Thanks.