Glen Scott

When a user updates their profile details, this plugin will record the data and time of that update. The date and time will be shown to the administrator through the Users -> All Users page

User Last Modified

Adds a last modified timestamp to user profiles

This plugin is not for most WordPress users. It will stop WordPress from automatically updating witch is not recommended. The only reason you might need this plugin is if you have modified your WordPress core files and you want WordPress to stop overwriting them with their automatic security updates. Otherwise you should probably just let WordPress auto update.
Updated April-19th

Stop Auto Updating Dangit

This plugin simply stop WordPress from automatically updating for you.

User Last Modified vs Stop Auto Updating Dangit