How to use mouse through keyboard

Press the Windows key on your keyboard.
In the box that appears, type Ease of Access mouse settings and press Enter.
In the Mouse Keys section, toggle the switch under Use numeric pad to move mouse around the screen to On.
Press Alt + F4 to exit this menu.
Windows 8
If the shortcut key combination listed above did not work, you may enable or disable Mouse Keys, using the following steps. If your mouse isn't working, use the Tab key and Spacebar to navigate through menus.
With nothing selected, type the word "Mouse" anywhere on the Start Screen.
Arrow down to Ease of Access mouse settings and press Enter.
Toggle the switch under Mouse Keys to On.
Press Alt + F4 to exit this menu.
Windows XP, Vista and 7
If the shortcut key combination listed above did not work, you may enable or disable Mouse Keys using the following steps. If your mouse isn't working, use the Tab key and Spacebar to navigate through menus.
While viewing the Desktop, press the Windows Key or Click Start in the lower left-hand corner.
Select Control Panel from the list on the right-hand side.
Within the Control Panel, open Ease of Access.
Under Ease of Access Center, select Change how your mouse works.
Check the box next to Turn on Mouse Keys.
Select Apply then OK.
Tip: If you want to change the cursor's movement speed or other settings, select Set up Mouse Keys