This certainly looks like a hardware issue, possibly the RAM, maybe the graphic card, maybe something else. Since you didn't tell how you checked the PC for RAM issues, all I can say is www.memtest86.com has a nice free program to test the RAM. If that fails: go back to the store and claim a warranty repair.
To get started, i recently bought a new graphics card and a new RAM memory. I didn't install any of them myself, it was all done by the store owner.After that i've been having random BSOD's but i wasn't able to see what it was typing because my pc was restarting really fast. The BSOD was coming at random moments, and i didnt give much of a notice at it as i supposed it would be a common virus and it wasn't bothering me at a daily basis ( probably 1 BSOD per week). Then a week ago my winxp got corrupted by the BSOD's and i wasnt even able to log in, so i formatted and installed win7 ( wasn't experiencing any troubles with win7 before anyways). After that, everyday, every 30 minutes or so the bsod pops up, but in win7 i can read what is it. Problem is it changes all the time, what i mean is that its either a Syster_servive_exception or Quota_underflow or Blue_Pool_Header or even one that it doesnt type anything. Most common one is System_servive_exception.I tried updating all of my drivers, downloaded Sisoftware sandra lite and checked my pc for any ram or other issues, changed my avast! antivirus to avg and changed my ram's position to another slot. Nothing changed though, and at the time being i can't really afford to pay someone to fix it, so im counting on you to help me. I ain't a computer expert, keep that in mind. I know i have to post something related to minidumps, but i prefer to listen and read carefully your advices.Just became a member of your forum aswell, hope you can help me solve this issue. Any kind of help/suggestion is highly appreciated.
Thanks in advance