I have tried many things to fix it such as, Ran scans like avast anti-virus, malwarebytes, and removed whatever was detected on my computer. Still the problem returns, I've also checked and updated my drivers (What I hope is all of them) and the problem still happens. The only thing I haven't touched is my BIOS because I can't find the BIOS for my extreme3 970 that supports windows 7 64-bit, and I know that if not done right you can really mess up your computer or so I'm told. Also I lost the cd for my motherboard

If anyone could help or even give ideas as to what the problem is that would be much appreciated!
PS. One of my buddies told me that it could be a problem with my memory is getting backed up and not refreshing or something like that? If anyone could help, again it would be much appreciated.