Acer Veriton 3900 User Manual page 24

12
Empowering Technology
Note: If your computer did not come with a Recovery CD or
System CD, please use Acer eRecovery Management's "System
backup to optical disk" feature to burn a backup image to CD or
DVD. To ensure the best results when recovering your system
using a CD or Acer eRecovery Management, detach all peripherals
(except the external Acer ODD, if your computer has one),
including your Acer ezDock.