Wife has been trying to install XI on our Xbox for about 3 hours now, every time at 25% left it lags and gets an error, I've checked memory, the disc, everything I can think of.

It's the brand new WoTG bundle pack disc, an older Xbox 360 (got it near when it was released and just haven't used it much) but everything else works fine on it. Plays movies, games, xbox live works.

Only problem is the message saying "Error occured" has anyone else had this problem / know of possible causes / possible fixes?

Any info is helpful, thanks.