Sometimes in Windows 8 you may find your application notifications getting stuck from time to time, the fix to this problem is to clear the notification cache at log off, here’s how.
Clearing the Notification Cache at Log Off
Press the Windows + R key combination to bring up a run box, type gpedit.msc and hit enter.
Now you will need to drill down into:
User Configuration\Administrative Templates\Start Menu and Taskbar
On the right hand side you will see a setting called “Clear history of tile notifications on exit”, double click on it.
Now switch the radio button from “Not Configured” to “Enabled”, then click on the OK button.
Next we need to force the updated policy to take effect on your PC, to do this press the Windows + R key combination, when the run box opens run:
Now every time, you log off your notification cache will be cleared.