which version of dosbox.

[moved]

0.71

Turn off "Automatically restart" in your My Computer - properties and then replicate the behavior that causes the BSOD. Instead of rebooting the computer should stay on the BSOD screen so you can identify what caused the crash.

Hm, apparently it was nv4_disp so it could be a GPU-related issue... I've updated to the latest drivers, though.

I think there's no way a properly coded app can crash your OS like that. Do you have the graphics card or your CPU overclocked? I've seen these "spontaneous reboots" on machines with broken RAM modules, or from machines that were incorrectly OC'd. Another source of that kind of problems could be old/incorrect AGP drivers.

AGP implementation sucked since first time it was devised. My ATi Radeon X800GTO tends to crash sometimes when AGP aperture is set to >128MB in bios. It's a pity, because setting AGP aperture to 256MB gives you a slight boost in fps.

No, I've never overclocked a thing and my card's PCI-E.

Well bummer if there's no solution. I guess I have to wait for new drivers or something. :\

Try core=normal and cycles=1000.
And check your memory with memtest.

Not working... and memtest didn't bring up anything either. :\

Maybe downgrade the video drivers then, and keep an eye on overheated components.