hmm thats a strange issue indeed, i have no experiance with steam versions my original one is from cd and with my laptop to play coop i use a pirated version cant u try it with ur steam key what i mentioned above? maby that does the trick there is no harm in trying i guess, unless there is someone around here with a steam version to in the past i have seen people with steam versions on here to with just worked so no clue why its doing that strange desktop crash =-|