When i put my charger my mouse pad is not working

SOURCE: my acer ASpire 2920z mouse pad freezes when I plug

Hi there, please hit FN+F7 key at a time for unlocking the key pad. After that, If its not working then follow the below instruction.
A)
1. Restart the PC and repeatedly hit F8 until you have a menu in front of you.

2. You will find few option there. Just select these mention option " Last know good Configuration ...." use by your up/down arrow on your keyboard.
3. Press enter there.
4. your will see the system asking you for which OS you want to use. If you have only one OS then just press ENTER there or select the OS and Enter.

If not working then try these step.

B)
Uninstall the mouse driver from the device manager.(Right click on My Computer then select manager. A window will open , there you will see device manager. Now select the mouse, then select the mouse device. uninstall from there.) Now restart the laptop. When you see all the icon is ready for work, then put your driver installer DVD & run the driver set up. When its finish, restart your laptop again. Your mouse will be ready for work again.
After these, if you again face the same problem then format the OS & install it again.Thanks & waiting for your feedback.
Thanks & waiting for your feedback.