I'm not much of a PC gamer, but I do have a few games. For my birthday, I just got the first Left 4 Dead game, but I'm having a few issues with it and was hoping some of you more experienced people could help me out. First, once I activate Steam, it refuses to quit. It tells me that one or more applications are running, but it doesn't say what they are or how to close them. Second, if I play Left 4 Dead but quit the game to do something else, if I try to go back to the game, I get the message that there can only be one instance of the game running, but I don't know how to get back to my game. Can anyone offer any help on this?