Sorry, we don't support RetroPie systems sold - selling the RetroPie image it's against its the distribution license and also against the license of some the emulators included. You'll have to contact the vendor that sold you the system and ask for support, we can't offer you support here.
Contributions to the project are always appreciated, so if you would like to support us with a donation you can do so here.
Hosting provided by Mythic-Beasts. See the Hosting Information page for more information.