Then click the Enter key. Why does it work? The forum says that this key combination skips through a series of screen buttons (which you can't see) to reach the Accept button.

The default button is the button which will be activated when a UI-defined activation event (typically the Enter key) occurs in the root pane regardless of whether or not the button has keyboard ...

One-click/key attack ... the file can be executed when English-speaking Windows 7 users type "r" and when Windows 8 users enter the tab key ... Clicking a booby-trapped HTML button while ...

Hold down the Ctrl key and click on the power button. ... Method 5: Go to the Windows Powershell, type “Restart-Computer” and press Enter. Method 6: The hidden emergency restart option; ...