Disable automatic reboot after update

Hello everyone,

unfortunatelly it happend again to me that my PC has restarted overnight, while an update needed to be installed. How can I disable this nonesense? I configured the GPO policy "No auto-restart with logged on users for scheduled automatic update installations". However, Windows still reboots itself after some time. It's driving me crazy, how isn't there an option for never automatically rebooting my computer? And I know I can pause updates, but only for 5 weeks or so, which isn't enough time.