I had the same problem as many of you.
a memory dump occurred with the famed BSOD:
"
IRQL_NOT_LESS_OR_EQUAL
stop: 0x0000000A (0x000000AF, 0x00000002, 0x00000000, 0x8050FA26)
"
[there was no other notable data.]
Here is the background:
I had been having problems restarting and loading into windows after the "Welcome" screen. Windows would tend to freeze about 15 seconds after displaying the Welcome screen, whether or not I logged in, this stayed relatively consistent. I was only able to get into Windows desktop upon a sacrifice to the computer god of toil and hair-pulling.
Up until the point of this error I had been experiencing some weird screen-tick when playing BF2 and various Valve games. In the middle of playing my screen would go black like the videocard was trying to change resolutions. This was normally harmless except that it would be aggrivating to gameplay.
Finally, in the middle of connecting to a CS source game server I experienced a game crash and then the system let out a f'd up screeching/static/chirping cacaphony of terror. I flipped the power switch and began to troubleshoot.
My solution:
I read much of the entries on the forum, and decided the problem may rest with my videocard or my soundcard. I'd recently done a driver reinstall of the soundcard, which is why i suspected that as well.
I went into safe mode with netoworking and downloaded "Nasty File Remover," the driver for my videocard, and the driver for my soundcard. I had to restart and get back into safe mode to make sure that I got rid of all references to the previous files.
Using Nasty file remover I removed all associated drivers for my Nvidia card and Creative SB Audigy 2.
I then installed the audio, restarted, went back into Safe Mode and repeated the process with the Video.
So far, This has fixed my freezing problems and sped up my computer a bit. Hopefully this will hold out as a solution for me, and hopefully it will work for some others as well.
I'm posting this as thanks for the posts before me that helped to fix my broken computer.
System
ASUS p4c800-e deluxe running bios 1022
P4 2.8ghz w/HT
1024 MB corsair 400 DDR
GeForce FX5900 Ultra
SB Audigy 2
120Gb Western Digital HD
400GB maxtor HD
Logitech wireless MX laser mouse
Microsoft keyboard