My son has been playing Minecraft (disk version) on his xbox 360 with no problems. However, last weekend, he went to stay at his dad's and took his xbox hard-drive so that he could play the game there from where he left off.
Since getting back, every time we try to load the disk, it just says "The game couldn't start, try downloading the game again."
I wondered if it was to do with me not having xbox live, so my son tried it out on a neighbour's xbox, which has got "live" and it worked fine. However, it's still not working on our xbox and I don't know what to try now. I don't understand why it's suddenly not working when it was fine before.
Any suggestions would be greatly appreciated, but please go easy on the technical jargon, as I probably won't have a clue what you're talking about!