Ok, so while my friend and I were playing Reach, I had my profile on a portable memory stick, and he disconnected the power from his xbox while I was signing out on accident. So now whenever I try to login on my xbox, it says corrupted profile, but if I move my profile to my friend's xbox, it works (probably because something was lost on his cache). Unfortunately my college blocks xbox live (go figure, right?) and I wasn't able to update it, so a recovery won't work.
My question is: if I restore my gamertag on my xbox from before (about 6 months ago), will all my saved games, credits, gamerscore, etc. be updated, or is that just lost?