I had a smiliar problem yesterday. (well it started on x-mas day) I couldnt get anything to open. It either said that my .DLL files were missing, I was out of memory, or it would just lock up.
I ran ad-aware and that helped, but not enough. I ended up having to back up all my files and then I reformatted my hard drive, and installed new drivers. I spent all day yesterday doing this.
I was a little pissy at first with having to spend the day trying to fix shit, but now I am 100% better. I even upgraded my windows.
No more problems
