Don’t put all your saves in one Eggs-box
My Xbox slim started behaving strangely the other day. I’d just bought some new games and was going through the process of installing them to the HD. Half way through the uninstall the Xbox crashed and I was back at the profile select screen.
I deleted the half installed game files and tried again. It still crashed and I was back at the profile select screen. This time selecting my profile would cause the Xbox to reset. I tried a different profile and it reset. Even accessing the system menus without selecting a profile would cause it to reset 🙁 As soon as there was HD access the Xbox would die.