Product key was valid for steam, then I downloaded game, windows live update thing came up for the game it eventually asked for a product key then said my key was invalid tripple checked I put right key in that steam accepted, it was right but won't accept it any suggestions?
Games for windows is a pain. it may be saying the key is not valid if your log in details for games for windows is invalid too.. check both instances. I had to do ym key 3-4times for F1 2010 before it worked.
That being said it isnt anything to do with your PC so if your still having issues i suggest you post on the steam forums