Close "Open Action Center" dialog popup

Below is a dialog box that popped up while working. How do I close it? I clicked on Open Action Center, but this one didn't go away. Other than:

• turning on Security Center service
• setting up a backup
• rebooting

is there a real way to close this?

(I'm looking for how to close it right now, not prevent it from coming up.)

You can disable specific alerts from appearing in the popup, which effectively stops the popup from appearing at all if there are no alerts to display.

Go into Control Panel, into the Action Center and click the link on the left to Change Action Center settings. Untick the Windows Backup option.

If it does not immediately disappear after applying the settings, try killing the explorer.exe process from Task Manager and start the explorer.exe process again (in the Windows Task Manager, select File -> New Task (Run) and type in explorer.exe).

Try these steps:

1. open Task Manager
2. end the explorer.exe process
3. click anywhere in this popup
4. open Task Manager again
5. go to File → New Task (Run...)
6. enter explorer.exe and hit Enter