Best (and safest) advice I can give is to flash the 360 to stock firmware first, then wait for the dashboard update 2.0.15572.0 which is currently rolling out.
. If things are then deemed ok, flashing to the very latest LT3.0 cfw is advised.
As for what else can be done... If you use XBL then my advise above is the only advice you and your friend should take imo.
Bookmarks