If one fine day your mouse stops working and to add insult to the injury the application you want to use does not support keyboard navigation, in such a situation you are left with no choice but to make use of Micrsoft Windows built-in MouseKeys utility to control mouse pointer using your keyboard and get important work done.

To launch MouseKeys :

1. Goto Start Menu -> Settings -> Control Panel.
2. From Control Panel, Start “Accessibility Options“.
3. Goto Mouse Tab.
4. Check the “Use Mouse Keys” as shown above.