I built a desktop about a year ago that has, until a few weeks ago, been running without a hitch using Windows 7 Ultimate.
Recently, the PC started occasionally rebooting with a blue screen indicating a "PFN_LIST_CORRUPT" error. Also, I've seen at least once the error IRQ_NOT_LESS_OR_EQUAL.
I seem to remember temporarily connecting an internal DVD burner about the same time this happened. I burned a DVD for another machine and promptly removed the drive.
Yesterday, I reformatted the drive and installed Win7 Ultimate x64. During the first install, the PFN_LIST_CORRUPT bluescreen reared its ugly head again. A second install attempt completed with no errors. The fact that this error happened during a clean install leads me to believe that this is not a driver or OS issue.
I also ran the memory diagnostic from the Win7 32-bit install DVD. It completed both passes with no errors.
Periodically, the screen will flicker, as if explorer or the video are resetting. In the event log, I see a series of 8 or so errors indicating that some services unexpectedly stopped, and were apparently reset. These include an HID service and some others (I don't have a list in front of me).
The PC is a Phenom X2 3 Ghz with a 500GB Seagate drive, 4GB of Corsair XMS2 cm2x2048-6400c5c.
Anyone know what would suddenly cause a couple of sticks of RAM to go bad?
I ran memtest86+ for a few hours last night and no problems were detected. However, I noticed at one point that the power supply seemed to go into overdrive, and is making an odd oscillating jet noise that it shouldn't. Time to swap the PS and see what happens.