I have a 2007 Pro. Recently, my copy of Gears of War 3 stopped working. I have used my copy on other people's slims and it works, but their copy of Gears 3 does not work on my Xbox. I was able to play it for almost two weeks before it suddenly stopped working. Now, when I put the game in, it gets about 7-10 seconds into the developer/publisher screens before it freezes. When I try to reinstall to the drive after deleting the file, I get the following: Can't read this disc. It may be scratched or dirty. Clean the disc with a soft cloth and try again. I did try cleaning the disc, but that did not help. Currently, everything else works great on the system, no problems or even the beginnings of one. I regularly play Space Marine, which is even in the same XGD3 format as Gears 3 if I am correct. I have also tried starting the game under different profiles and no profiles, but that did not work. Any help to get this game working would be very much appreciated.