Major Amnesia video problem

[R31nm4n]

I start Amnesia up, make a new profile, and get to the main menu just fine. However, I noticed that the normal background to the main menu (the one with the creepy door and torch and stuff) wasn't there, it was just a solid black background, but all the buttons and the title were there. I ignored it, thinking Frictional Games just took out the background in a recent patch or something, I didn't think it was a big deal. BUT when I started up the game, I could see everything but the world...as in the HUD (hints and reticule) would show up, but everything else was just black. I pushed buttons and move the mouse and the acoustics would shift with the direction I pointed the mouse and the footsteps would sound according to me pushing WASD just fine. I just couldnt see anything!