Turn off your device and insert the USB drive containing Rescue Disk into the USB port.Burn the Rescue Disk file onto a blank, recordable CDīooting Your Device from Rescue Disk USB Drive.When Rescue Disk is finished creating the ISO file, click Ok.Select a location to save the Rescue Disk ISO file, then click Save.Wait for the progress screen to show the Rescue Disk has been completed, then click Ok.Insert an empty USB drive into your device's USB port, then click Create USB.Click Rescue Disk on the right side of the screen.Open the Avast Business Antivirus or Small Office Protection client UI.