If you check your Acer manual, on page 62, it describes how to reset your laptop to factory settings,
1. Press <Alt> + <F10> or select Acer eRecovery Management from the Empowering Technology toolbar to start Acer eRecovery Management.
2 Switch to the restore and recovery page by selecting the Restore button.
3 Select the backup point you would like to restore from. You can also choose to recover the system from a factory default image, recover from a previously created CD/DVD or reinstall applications and drivers.
4 Follow the instructions on screen to complete the process.