Hi, ok this is my situation. I bought a modded Xbox 360 on late 2009. This years may, i downloaded an xbox live may update. So now i cant play backed up disc. I know its in stock firmware. I havent gotten flag by Microsoft So if i play my xbox 360 on Xbox live in its stock firmware with original discs Will i get banned?
If you haven't been flagged for a ban (either client-side or server-side), then you're fine. Even if you have been flagged, you may not necessarily get banned. If you stay offline you're effectively banning yourself anyway.