How do I reinstall the Operating System on my computer?

How do I reinstall the Operating System on my computer?
Select models, with Microsoft Windows, have the ability to have the Operating System reinstalled from a hidden partition built into the computer.
Note: During the process, all data stored on your computer will be overwritten. This means all your files, such as email and photos, will be erased. Therefore, we recommend making a backup of all personal data before starting the recovery process.
To start the system recovery:

1.    Restart the computer.

2.    When the Acer logo appears on the screen, press the Alt and F10 keys repeatedly.

3.    If you are prompted with a Microsoft Windows boot screen, press the Enter key.

4.    After the system recovery application has loaded, follow the prompts to reinstall the Operating System.

If the ability to reinstall from the previous method is not available or fails, recovery of the Operating System will need to be from Recovery Media. If you do not have a set of Acer Recovery Media, you may purchase the set online from the Acer Recovery Media Order Form..
Note: If your computer does not have an internal optical disc drive, an external optical disc drive will be required in order to recover the Operating System using Acer Recovery Media.

1.    Restart the computer.

2.    When the Acer logo appears on the screen, press the F12 key repeatedly to enter the computer's Boot Menu.

3.    Press the CD-ROM drive eject button and insert the disc labeled System CD.

4.    Close the CD-ROM tray.   

5.    Refer to on screen instructions to select either CDROM or USB CDROM.

6.    The computer will boot from the Acer Recovery Media

7.    When prompted for the Recovery CD, remove the System CD and insert the Recovery CD.

Note: If there are multiple Recovery CDs, please insert the first of the Recovery CDs.

8.    After the system recovery application has loaded, follow the prompts to reinstall the Operating System