Ragewind

Hello everyone, Since this thread is the top search result when searching for "take on helicopters steam bad serial number given during setup" I want to add another possible solution as well. I recently bought a bundle of ToH + ToH:Hinds on Steam. After completing the download I could not start the game, because the Hinds installer would abort, claiming not being able to find the ToH key in the registry. The solution previously given in this thread did not work for me. After a lot of different tries the solution was easy, but also easy to forget about: On my system (Windows 7 64bit) the remedy was the following: The steam client has to be started as Administrator (Exit Steam if currently running, right click on Steam icon -> Run as Administrator) when starting ToH for the first time, because otherwise it does not have the necessary permissions to write into the required registry locations. This needs to be done only once, next time Steam can be started normally. Best wishes, Ragewind PS: Now that I'm through this I'm aware this is/should be standard procedure for game failures on steam, hope it helps someone though.