Somehow my friend got his profile on my 360 to sign in at every start-up. How do I change it back to my original profile? It's a bit tedious to sign out, wait awhile, then sign in and wait while Xbox Live connects. I'd rather have it all done initially. I don't know how the 360 judges which profile gets the initial sign in, but my friend's profile has a grand total of 0 gamerscore points and a total play time of about 1 and a half hours.