To me that suggests a video driver, as it is about that stage that it takes over from the windows one
Agree....sounds like it but wouldn't it boot into Safe Mode or VGA then be OK ?
User7, is this a desktop PC or laptop ?
If laptop, one other thing to try is to connect an external monitor to the PC and when the screen goes black see if an image comes up on the monitor. You may have some odd setting that just changed the active display on you.....just a thought.
If desktop and you have on-board graphic controller with a graphics add-in card......pull the gfx card and set the BIOS to use the onboard.
............see if any of the above show anything.
The next option would be to get a boot/rescue CD and boot into that environment and remove/uninstall the graphics drivers.....just go back to Windows default. Perhaps bob3160 can suggest best bootCD ?......there are a lot out there (Hiren's , UBCD, BartPE, etc.)....here's some suggestions:
http://lifehacker.com/5984707/five-best-system-rescue-discs