Chromebook 3100 & 3100 2-in-1 owners have reported that their systems are stuck in a reboot loop after attempting to install a ChromeOS critical update.
(Figure.1 Chromebook 3100 & 3100 2-in-1)
You must:
Create a new Recovery Utility USB
Insert the USB recovery USB into the system
Press ESC + refresh + power together to force the system to boot from the USB drive
You can download the Chromebook Recovery Utility on the following link: