Reinstall the Operating System On Acer Laptop

some cases that cause the operating system on your laptop crashes atupun damaged by virus or is not accidentally deleted, and cause your laptop must be installed back to the operating system that is still fresh, to do this please follow the steps below, make sure all important data backed up first, 

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 from need to be from the Recovery Media. 

Note: If your computer does not have an internal optical disc drive, an external optical disc drive will from be required in order to recover the operating system using the 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 CD System. 
4. Close the CD-ROM tray. 
5. Refer to on screen instructions to select Either CDROM or USB CDROM. 
6. The computer will of the 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.
After the system recovery application has loaded, follow the prompts to reinstall the Operating System