I have downloaded the game on a laptop and a desktop computer with no problems. When I downloaded the game on another laptop, everything worked fine and I was able to play the game immediately. However, when I went back in to play later, I got a message saying the game was not installed. I did a reinstall and was again able to play immediately upon completion, but got the same message when I went to play later on. I don't know why it works on the other two machines and not on this one. I brought both laptops on vacation and my son is bummed that we cannot both play because of this problem. Any insight as to why this is happening? Both laptops are brand new Dells and have enough memory and disk space to hold the game. My husband, whose laptop it is, says it could be something to do with temp file space. He does not allocate any. Please help so my son can play the game with me on vacation.