If your mouse is not working and you still want to use the pointer, you can use the mouse keypad. However, it is only available with the full keyboards, i.e., those which come with a numeric pad. Look for arrow keys that allow you to move the pointer in the required direction. To enable numeric keypad in Windows, go to Settings > Ease of Access/Accessibility > Mouse. Toggle on Mouse keys.
Next, configure when the mouse keys come into action, display mouse keys icon, keys speed, and keys acceleration.