Phone going crazy after recent update

My gf has a N5 and decided to let the update install (not sure which one was on the 23rd) and all of the sudden her phone just went crazy. It reboots randomly, sometimes it will boot completely and other times it just gets stuck at the boot screen. Before this update the phone was working normally and it doesn't appear to be an issue with the power button.

Her phone is bone stock. No root, no unlock. It is unfortunate, but she is on travel and has no phone.

Has anyone else seen this sort of issue after a software update?