EDIT
I fixed the problem, I just deleted everything in the My Documents/My Games/Oblivion









Okay, so I have hours stacked on oblivion, but when I went to play today, it crashed.
I reinstalled it clean, and I have no mods at the moment, and it still crashes on start up.

I got rid of EVERTHING in the Oblivion folder, no OBSE, OBMM, or anything, and it still crashes!

What do I do?
btw, I have Windows 7 and Steam Oblivion.