Use Keyboard as Mouse.
If your mouse is not working and you don't wish to wait till you get a new mouse, you would definitely like to
know how you can use your keyboard as your mouse. It is easy to use your mouse as keyboard in windows using the On Screen Keyboard utility, but it is also possible to do the reverse
All you need to do is:
Windows 8, Windows 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 the mouse keys.
For laptops, this will only work if your laptop keyboard has a numeric keypad or alternative keys which you can
enable by pressing the Number Lock Key or the Function key.
On my laptop number 6 key of the numeric keypad moves the mouse pointer left, number 4 key moves the mouse
pointer right, number 2 key moves it down, number 8 key moves the mouse pointer up, number 5 and + key serve as
right click while the number 0 key works as left click.