So I installed Windows 7 on my laptop about a month ago, and a few weeks later installed it on my desktop as well. However, after two weeks or so of using it on my desktop with no problems whatsoever, it has suddenly decided to stop working.
When I start windows, everything appears fine. The Welcome screen displays and I can enter my password. Windows gives me the nice loading icon aside the "Welcome..." text and waits for several moments.
Now, normally, it would fade to black and fade back into my desktop and I could continue on. However, the desktop no longer appears. After I finished playing Oblivion today, I did a reboot as I always do (just to clear out the memory). But when I went to log on, it faded to black and nothing else happened. No cursor, nothing.
I did find that I was able to get the Control-Alt-Delete menu, but "Switch User" and "Lock Computer" are the only options that work; they take me back to the welcome screen so I can shut down or try with futility to log in again.
I am able to boot into Safe Mode, so I went to the UAC panel with it and created a new administrator account; same problem there. It just faded to black as soon as I logged on as well.
Now, the only things I installed recently were a few Windows Updates yesterday (but had to reboot after that, and it was fine), and a DirectX version (9.*, I forget which exactly), as well as the DirectX SDK. I have not rebooted since those two installs.
Do you guys have any idea what would be causing this black screen? An hour of Google searching has given me nothing to go from.
Any help is greatly appreciated.