99% of the "Xbox 360 BIOS" files available on forum posts from 2012 are either:
: Downloading and modifying the Xbox 360 BIOS can be risky and may void your console's warranty. Proceed with caution and at your own risk. Xbox 360 Bios Download
Instead of downloading a new BIOS, users can try the following alternatives: 99% of the "Xbox 360 BIOS" files available
The legal way to play is by using a specialized disc drive to "dump" the game files (ISO/XEX) from your own physical Xbox 360 discs. 4. Updating Real Hardware Xbox 360 Bios Download
Before downloading an Xbox 360 BIOS, please note: