If you're on OSX/macOS (what a silly rebrand) then if you look in ~/Library/LaunchAgents (and possibly /Library/LaunchAgents and /Library/LaunchDaemons) for any

If you're on OSX/macOS (what a silly rebrand) then if you look in ~/Library/LaunchAgents (and possibly /Library/LaunchAgents and /Library/LaunchDaemons) for any .plist from Google (or Keystone) in there and add <key>Disabled</key><true/> under the first <dict> and then unload each file, e.g. launchctl unload ~/Library/LaunchAgents/com.google.keystone.* The auto-updating stops and stop them reloading after a reboot/logon.