It will re-register a lot of things and should fix the action center issue. If the system icon is turned on, you should see it in the right place. You may have to restart the computer once.

If it isn't enabled already, that's the reason icons have disappeared from your Windows 10 desktop. Disable Windows 10 Tablet mode. The easiest way is to Select the Action Center icon in the lower ...

Normally, to open the Action Center, you have to press Windows key + A or just click the Notifications icon on the system tray on the taskbar – the Action Center pane closes automatically when ...