Hi. I recently built a computer.
Intel Core i7 Sandy Bridge 2600k (1155)
Corsair 650W Power Supply
MSI P67a-gd65 (B3) Motherboard (DDR3) (1155)
Nvidia GeForce 9800 GT Videocard
Western Digital Caviar Black 640gb HDD 6.0gb/s
Cisco WMP600N PCI Wireless N PCI Adapter
(Linksys E4200 Wireless Router [ISP: Comcast])
2x2gb RAM Mushkin DDR3 (1600)
Antec 901 Case (Not that it mattters)
I got all of the parts and assembled them maybe 3 weeks ago. After using it successfully for about or less than a day, I started getting blue screens such as PFN_LIST CORRUPT, MEMORY_MANAGEMENT, and some other things that I can't remember. Anyways, upon seeing this I began to try to root out what the problem was. First, I did a memory test on my BIOS and I also used memtestx86. Both of them came out clean. I also tried LinX stress test, and my cpu passed. I tried my old hard drive and the blue-screens persisted. I tried another video card (even though my 9800GT was working on my computer before this one) and the blue screens STILL persisted. I called MSI and they told me to send in my motherboard and that they would send me a new one. I did that, and I got my new one two days ago.
Yesterday my computer was working fine (after I reassembled it all), and I was quite happy. I did a few restarts for updates and it was still OK. I left it on overnight and woke up to see that it was still fine (and that it had finished all of my downloads). However, later today, after restarting it due to updates and stuff, the whole computer started to go haywire. First of all, I started to have the same old BSOD errors, as well as IRQL_NOT_LESS_OR_EQUAL. Also, randomly, my Windows Explorer would crash, or my internet would crash. Sometimes I cant even open an application (Skype, Steam, Chrome, etc.). The blue screens happen anywhere from 5-20 minutes in after starting my computer. I called MSI again, and they told me to upgrade my BIOS. I did that and the problems persisted. I called them again, and they told me to update my drivers. I did that and the problems persisted. I'm running out of options and sanity. Please help me, I've asked friends who are good at computers and they have no clue either. Thank you in advance.
PS.: My internet also randomly cuts out and I've done four clean reinstalls of Windows 7 32-bit