I seem to be having a problem with my PC crashing which just started today out of the blue. The PC just rebooted on me suddenly and when it got back to the screen asking me if I wanted to boot into safe mode, I selected Start Windows Normally. It then blue screened on me.
I'm running Windows 7 RC dual boot along with Windows XP. I thought it was a problem with Windows 7 but when I tried XP, that crashed as well. It usually crashed as soon as I click on one of the login accounts on the Windows Login screen, and this happens for both the XP and Win 7 partitions.
I left the machine off for a few hours and when I turned it back on, everything was running fine for about 15 minutes before it rebooted on me. This time, I selected Windows Memory Diagnostics Tool. It said that a hardware problem had been detected but the PC crashed again before it was done running the test fully. After the reboot, I selected safe mode, which also crashed upon login. Finally, after another reboot, I selected the option to stop allowing the PC to reboot automatically after a crash. This time, I got a blue screen with a STOP (Fatal Error) message. The code was C000021a.
Does this sound like anything familiar at all to anyone? The PC has been running fine. I haven't added anything new, hardware or software, for a little over a week. I literally just turned the PC on this morning, like I do every morning, and the problems started occurring.
Thanks in advance, hopefully someone has some ideas.
Forgot to add: I don't think it's a heat issue because I have pretty good airflow and I just recently (about a month ago or so) replaced the CPU's heatsink with a brand new Thermaltake model. I've also been checking speedfan when I can and it's not reporting any temps that are out of the ordinary.
Edited by EricJB, 22 August 2009 - 07:18 PM.