SHLWAPI.dll Errors?

I've recently had an error with the file above. It said something about no entry point for explorer.exe, and some other programs, but now my computer wont boot up at all, which is where my problem differs. For some reason, my computer just endlessly restarts itself. I tried going into safe mode, and that didn't work, still just restarted itself. Then I disabled the auto-restart on system failure, and it gave me this:

"Stop: c0000221 {Bad Image Checksum}
The image SHLWAPI.dll is possibly corrupt. The header checksum does not match the computed checksum."

And I don't know what to do in order to get my computer to boot up to fix the problem. Any help please?

 

Possibly this ? (more pc info please)

http://support.microsoft.com/default.aspx?scid=kb;en-us;326687