A known fix from Lenovo support for the "Restart Loop" issue involves a hardware reset:
The computer will restart automatically once complete. Potential Issues After Update version 1.25.0.0 bios
: Users have noted this version number while troubleshooting "Boot Device Not Found" errors or during automated hardware scans. A known fix from Lenovo support for the
Updating your firmware will often restore all advanced parameters back to basic factory defaults. If your computer keeps cycling back into the setup screen, your boot manager links likely need to be re-synchronized. version 1.25.0.0 bios