How to use key board as a mouse in windows 7 ?

You can do so by following the steps given below:

1. Logon to the Windows 7 computer.
2. On the desktop screen right click at any vacant area and from the menu click on Personalize.
3. On the opened window at the bottom of the left corner click on Ease of Access Centre link.
4. On the appeared page click on Make the mouse easier to use link and from the next window underControl the mouse with the keyboard section check Turn on Mouse Keys checkbox.
5. Optionally you can click on Set up Mouse Keys link to fine tune the settings.
6. 
   

   Turn On Mouse Keys
7. Once done, click on Ok button to finalize the configuration and close all the opened Windows.