I was thinking it could be but I've never had any problems with my Steam games so wouldn't know much about errors on Steam.

yeah i have played it but on another computer do u suggest i get a disc copy
but then thats 30 dollars down the drain

i havent used steam in years, since my counter strike days but if you buy and download a game from steam, usually you have to go to a steam panel to start the game up, maybe they have something in there, if they even still use a panel last time i used steam they did.

all my other games from steam work

You should be able to burn the downloaded Steam game to a disc, if you can find the file. I do this for all games I download for backup purposes.