I am getting the same crash problems. I have reinstalled the game, reinstalled windows (tried with and without sp2), tried it with no addons, tried it without the patch and all the other things that people have suggested.
I have even replanced:
motherboard a7v8x-x was some old thing not worth mentioning
cpu (gone from 850MHz celeron to 2.08GHz athlon xp 2800+
heatsink & fan
Ram - now using 1GB (2x512) DDR 3200 instead of the 512 sdram with old motherboard
graphics card is now FX5200 instead of my old TNT2.
game STILL reboots the PC.
I sent an email containing a screenshot of my settings, a description of my pc setup, an explanation of the problem and the dxdiag.txt file, to the official support people. They emailed me back asking me to describe the problem and send them dxdiag!! ffs!
Yes i've tried removing a stick of ram etc, no it didn't help. Yes I've read half a million posts in various forums and asked people in game.
I usually get told its due to overclocking, overheating or faulty RAM etc etc etc
I have more or less got a whole new PC just to solve the problem and it hasn't. As you can imagine,
"i'm a mushroom cloud layin MF" right now!
This HAS to be sorted out seeing as a certain sequel to a certain other FPS has been cancelled for the PC... and they're apparently going straight to part 3. But i'm not even going to go there.
Any other ideas, please?