I am getting an An "error occured while installing AppID 0: "Invalid backup path" when trying to install my game from the CD. I know I had it installed on my old computer and I am pretty sure I have only ever had my one current account on Steam. On the off chance that I did have an old Steam account How could I find it? I will not be a happy camper if I legit bought a game that I cannot install or use now!