[mamasboy]

From a google search:



1) Hold down the power button for 10 (ten) seconds to switch off your machine.

2) Press and hold the 0 (zero) key and at the same time, tap the power button once to switch on your notebook.

3) When the machine Starts beeping; release the 0 key.

4) When prompted by the warning screen; select Yes to continue with the system recovery.

5) Select Recovery of Factory Default Software; click Next.

6) Select Recover to out-of-box state click Next again.

7) Click Next to Start recovery.

Or.

Switch on and immediately start tapping F8 - Highlight "repair my computer" by using the arrow keys.

You`ll find the option for factory restore in there.