The next version of Windows 10 is codenamed 19H1 and expected for release around April 2019. In 19H1, Windows Update now displays an icon in your notification area when you have to reboot your PC for updates.
This new icon was highlighted by Microsoft in a blog post announcing Windows Insider build 18290:
Starting with 19H1, when your device has an update requiring reboot (including new builds we release) you will see Windows Update icon with orange indicator in the notification area (system tray) alerting you to restart your device.
Some people may not like the extra clutter, we think this is a great idea. It’s a more unobtrusive way to highlight updates than a big “You need to restart your PC” message that interrupts what you’re doing. When you see the icon, you know that you should probably restart your PC at some point that day. Consider it an advance warning before Windows Update gets really annoying.
This system tray icon was off by default on our test system. To enable it on Windows 10 19H1, head to Settings > Update & Security > Windows Update > Advanced Options and set the “Show a notification when your PC requires a restart to finish updating” option to “On.”
Right-click the icon and you’ll see options to restart immediately, schedule a restart time, open Windows Update, or temporarily hide the icon.
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Source : Windows 10’s System Tray Gets a Restart Icon for Updates
