Never discover an overnight Windows restart by finding yesterday's unsaved work gone. RebootWarn quietly watches Windows Update from the notification area and gives you an unmistakable warning when a restart is pending, while there is still time to save everything and reboot on your own schedule.

It stays out of the way, launches automatically after sign-in, and needs no cloud service or account. When Windows Update requires a restart, the tray icon turns red and RebootWarn sends a configurable daily reminder with a direct link to Windows Update.

• Uses the Windows Update Agent Microsoft.Update.SystemInfo.RebootRequired signal.
• Checks on launch, every 15 minutes, after resume, and when Check now is selected.
• Starts after user sign-in through the packaged windows.startupTask extension.
• Shows the status window on the first interactive launch; later launches start directly in the tray.
• Closing the window keeps the app running in the notification area; use Quit from the tray menu to exit.
• Notification and tray actions can open ms-settings:windowsupdate.

.\BuildAndRun.ps1 .\RebootWarn.csproj --arch x64
dotnet test .\RebootWarn.Tests\RebootWarn.Tests.csproj -c Debug -p:Platform=x64
.\BuildAndRun.ps1 .\RebootWarn.csproj -c Release --arch x64 --no-launch
.\BuildAndRun.ps1 .\RebootWarn.csproj -c Release --arch arm64 --no-launch