You can now reliably boot a completely unmodified Xbox 360 into a custom dashboard in about a minute, using the latest “BadUpdate” exploit. The developer Grimdoomer originally released this back in March and while it was an amazing accomplishment, it didn’t work on all consoles and sometimes wouldn’t work at all. This latest v1.2 update was worked on my kmx360 and both the speed and compatibility has been significantly updated – You can now boot most consoles in a custom dashboard in about a minute! This will allow you to have most of the same features as a hardware-modded 360, with no “modding” required, just a USB stick.
The only real downside of this exploit, is you need to run it every time you boot your 360 to access homebrew, however some may view this as a positive, since you can leave your 360 completely unmodified. If you’d like to see it in action, MrMario2011 has a video above showing the new update, as well as a video below showing how to set up your USB stick. The below video should be the same exact procedure, just make sure to download the latest v1.2 (or whatever’s the newest at the time of reading this) in order to get the best version.
Also, Modern Vintage Gamer also did a video on it, showing the much faster loading times and adding some thoughts of his own. Check that out below as well.