compiler error-HELP

My external drive became unplugged while I was writting a program. After getting everything hooked back up and compiling the program I have been getting an error that reads:

fatal error C1001: INTERNAL COMPILER ERROR
(compiler file 'msc1.cpp', line 1786)
error executing cl.exe.

I have run the program on another computer and had no problems with it. Now I am trying to run it again and am getting the same error.

Does anyone have any idea how to fix this. The error comes up on all program I try to run now.

cl.exe is the actual compiler underneath VC. If you can't compile anything, it would seem that it, or some of it's support files were clagged when you disk went down. I would re-install VC.