I for one have the the arcade xbox360, i have 2 of them, one was manufactured feb 2008 and the other was March 2010. Now what i noticed is that the update downloaded and installed with no problems what so ever one the 2008 cosole, no freeze up, getting online or anything. So i tried to update the 2010 console...... was not needed, so, im thinking this may have been for the "older" xbox360's. I'm thinking it was for pirated games or third party mods to the console. I did notice a performance boost in the system, I.E. load times refresh ECT also.