The automatic update restarts are the worst. Followed guide here and have not come into work with a restarted computer since (used Method 3):
http://www.redmondpie.com/disable-turn-off-automatic-updates...
Option 2 is for hiding specific updates, like broken drivers. Doesn't really apply.
Option 3 again will stop updates from installing in the first place, but will not stop reboots once they're installed. Windows 10 completely ignores the "No auto-restart with logged on users" policy from that same group.
The only way I have found to stop my computer from rebooting after installing an update is #2 in the link below. This works, 100%.
https://superuser.com/questions/973009/conclusively-stop-wak...