STOP 0x000000A5

[sctakeshi]

This morning upon booting up my main computer, I was greeted by Windows with a blue screen and the aforementioned STOP message, which has to do with BIOS not being ACPI compliant. The computer booted fine yesterday and I did not change the BIOS (nor did I make any hardware or software changes).

I also tried booting off an Ubuntu CD and it seems to hang on "Booting the kernel."

The computer POSTs fine and hard drives check out with SMART.

I had done a Google search for this STOP and it seemed like it could be a memory problem, so I swapped out the memory for a known good DIMM. Still same message.

What do you suggest?

Specs are as follows:
AMD Athlon 64 X2 Toledo 4200+ 2200MHz
Asus A8N32-SLI Deluxe
2x G-skill 1024MB PC3200 DIMM (but also tried a single 512MB Buffalo PC3200 DIMM)
Samsung Nidec SP80 @ 80GB (PATA)
Samsung JVC SP80 @ 160GB (PATA)
Samsung Nidec SPT @ 500GB (SATA)
HIS X800GTO (PCI Express)
PC Power & Cooling Silencer S61EPS @ 610W
NEC ND-3540A
Alps 1.44MB floppy
Creative Audigy2zs (PCI)
Running Windows XP SP1, but also tried Ubuntu, I think version 6.06.1

Thanks

 

[sctakeshi]

Okay, I feel like an idiot, but I found the problem. An SD card inserted in my SanDisk USB card reader was causing the error. Removing it caused the system to boot fine. Just posting this in case it ever helps anyone else down the line.

 

[nineball9]

Thanks for posting the resolution sctakeshi!