bsod mystery

I've been running the current build since it came out but all of a sudden today it seems to have hit a wall.
It's now booting up as far as the white Windows "logo" and progress dots, then going straight to a BSOD.
Under Technical information it says: *** STOP: 0x0000007F (0x00000008, 0x80135000, 0x00000000 0x00000000)
Not very illuminating - at least not to me! I thought perhaps the video drivers had somehow become corrupt(!), so I booted into safe mode and uninstalled them. That at least brought me back to my desktop in VGA mode, and I was just going onto the internet to download the NVIDIA drivers when the same BSOD came up again! So something is clearly not right.
Any ideas, anyone?