If you want to stop windows 11 update notifications from interrupting work calls, full-screen gaming sessions, or presentations, you can disable the nagging toasts without breaking essential security protections. When you stop Windows 11 update notifications properly, updates still install quietly when you manually shut down your PC.
Open Settings → Windows Update → Advanced options. Toggle OFF the switch: "Notify me when a restart is required to finish updating". Also toggle OFF "Get me up to date (restart as soon as possible)".
In the same menu under Active hours, change the dropdown from Automatically to Manually. Set your start time to 06:00 AM and end time to 11:59 PM. Windows is prohibited from displaying restart toasts during these hours.
Press Win + R, type gpedit.msc. Browse to: Computer Configuration → Administrative Templates → Windows Components → Windows Update → Manage end user experience. Double-click Turn off auto-restart notifications for update installations and set to Enabled.