I seem to be having a problem playing this campaign, it loads it up and once it starts, L4D2 crashes and shuts down, when i first started downloading this update, it was "SUSPENDED" due to the Steam servers being too busy at the time, then the computer was shut down while the downloads were suspended, then i started the computer back up later and it finished downloading just fine, could the files be corrupted or something?
How do i fix this?