This would happen rarely so I never cared to look into it, in the last year it did this a little more, but not enough that it was a big problem. I, figuring it was the graphics card, would take out the card and put it back in and it seemed to help but it might not have been doing anything. Lately it has been doing it every time I turn it on, and when it happens I now get a blue screen of death. It doesn't happen automatically and it is very random, but sure enough eventually it does.
Now I also believe I have ruled a few things out. For one I did virus scans regularly and usually everything I download I scan, I am pretty sure this isn't a virus. The last antivirus I used was Avast, before that I was using AVG for a while (it blocked my internet connection so I stopped using it), before that I used Microsoft Security Essentials (I used that one for a long time, I stopped using that one because it would crash my computer usually after it updated and i would always have to use a system restore point), and the first antivirus I used was Norton 360. None of these programs would ever find a virus that would cause this restarting problem. I uninstalled Avast like a day ago to see if maybe that was causing the blue screens and it wasn't. So basically I'm pretty sure that neither a virus nor antivirus was causing this problem.
I also thought that maybe it was the hard drive failing so I used Chkdsk to see if there was anything wrong with it. I looked at the log and as far as I know it didn't find anything. This led me to believe that it wasn't the C drive but I may be wrong. I only used Chkdsk on the hard drive that windows is installed on and it's 1TB in size so it took forever. I have another 2TB hard drive that Install all the games I can in but I have yet to scan it since it would probably take twice as long.
I was completely dumbfounded as to what it could be, I tried reading the minidumps and the memory.dmp files using windbg but I had no idea what I was looking at. Not to mention that windbg kept complaining about not having symbols or something, either way I lost patience with it.
Being desperate I opened my case, unplugged all the hard drive cables, took out all the ram, took out the graphics card, and gave it a good aerosol dusting. This actually seemed to work for a few weeks but it started blue screening again yesterday. I'm not sure if that's coincidence or if unplugging everything and putting it back in actually helped.
Alas I did find some hope, when I turned on my computer today I thought it would be a good Idea to leave it idle and see if it would crash with no provocation. It stayed on for a good couple of hours with no problem. I booted up firefox to look up some stuff and it stayed strong, I played a game for a few minutes and still nothing. I decided to cook some breakfast which took me a good 20 to 30 minutes when my brother yelled at me from upstairs to tell me that it had blue screened and rebooted. At this point I was about to give up and just take it somewhere to get it fixed but when I logged back in and started up firefox again it brought up the recovered tabs and one of them was a youtube video my brother had looked up. Looking back I realized that every time my computer has blue screened there was always some sort of video playing. The first time it did I was watching some shows on vlc but If i remember correctly I also had a youtube vid buffering in the background. Point is usually if there's video, I get a blue screen and I go on youtube every time I turn it on. This has led me to believe that it actually was the graphics card the whole time, but still I could be wrong.
As of now it has not crashed and it has been another couple of hours and I have yet to go on youtube or watch any other videos for that matter. Also I think I already put it in here but gaming doesn't seem to effect it.
Sorry about the length but I was trying to be as detailed as possible, I have included the minidumps in a zip so you guys can look them over and such. Thanks in advance for any help. Also I have yet to check the ram so that might be it?
Here are my specs:
Windows 7 Home Premium SP1 64 bit
Asus Essentio CG5275
Intel Quad Core i5 3.2 GHz
8 gigs of ram
Radeon HD 4650 512mb ddr2 (yeah I know it's gross)
Don't know about the motherboard