Use Keyboard as Mouse

For Window Xp Users:-

1. Go to Control Panel.
2. Then click on Switch to Classic View.
3. Then Click on Accessibility Options.
4. Then Click on the Mouse Tab.
5. Select Use MouseKeys.
6. Click on OK.
7. Then activate NumberLock (by pressing the NumLk key).
8. You should hear a beep sound.
9. Now you can control the mouse pointer using the arrow keys on the numeric keypad.

For Window 8,7 and Vista Users:-

1. Open Ease of Access Center by clicking the Start button , clicking Control Panel, clicking Ease of Access, and then clicking Ease of Access Center. 
2. Click Make the mouse easier to use.
3. Under Control the mouse with the keyboard, select the Turn on Mouse Keys check box.

You can also increase the acceleration and speed of your mouse movements according to your needs.

You can alternately press the Alt+Shift+Num Lock combination to instantly activate Mouse keys.