Windows Notification Fixer repairs a well-known Windows 11 bug where notification banners stop popping up — the notification count keeps climbing and sounds may still play, but nothing appears on screen, often after the PC sleeps and wakes. Microsoft's only official remedy is to reset Windows or create a new user profile, which is far too drastic for a notification problem. WNF fixes the underlying issue in a single click, with nothing of yours touched and no reset required. It can also run on a schedule, so if the bug returns it's repaired automatically before you'd even notice a missed notification.