Kind of a big problem here. I reinstalled Windows 8 (as an upgrade from Windows 7) yesterday, as the one piece of software that was giving me trouble in it had recently updated to support it. Anyways, all was going well until I went to install updates last night - I shut down for the night and let it update, but when I turned my computer back on this morning, I'm getting a flashing black screen. The monitor turns on and off ever two seconds or so, and for the two seconds it is on, it is simply a black screen with no cursor present.
This is a problem because I cannot use shift+F8 to boot into any sort of diagnostics menu, as Windows 8 boots so fast that the time it actually is checking for the key combo is near nothing. And since I cannot boot normally... well, you get the idea.
Any suggestions? I would prefer not to completely reformat and reinstall, of course.