Issue:
The arrow keys navigation does not work in Excel application on your system. The same arrow keys navigation just works fine in other applications.
Solution:
You probably have the Scroll Lock special key pressed/enabled on your keyboard which causes this behaviour. To fix click on Scroll Lock special key to release/unlock/disable it. The Scroll Lock special key varies from keyboard to keyboard. On my system keyboard, the Scroll Lock function is associate with Home button. To control it, I need to press Function key (Fn) + Home button.
