Zotac ZBOX nano XS AD13 and AD13 Plus AMI BIOS version 2K121114 can now be found on Softpedia. It is targeted at the AMD M3L chipset, and will install the Suspend-To-RAM (STR), Hardware Monitor, on board LAN and HD Audio features, as well as Zotac's ZBOX Full Screen Powerup Logo.
Before you begin, make sure the system is not overclocked, and anti-virus, screen saver and other programs are turned off because any pop up messages may crash the update process.
To install the BIOS, unzip the downloadable file in the “C:\BIOS\” pre-defined folder, and execute as an administrator the “update.bat” file, which is compatible with both 32-bit and 64-bit Windows OS versions.
Afterwards, a cmd window will appear with four options: [B] for backup (it creates a “backup.rom” image), [U] for updating current BIOS, [R] for restoring BIOS (from “backup.rom” image), and [E] for exiting without any action.
If one of the first 3 options are selected, setup will continue with the corresponding menu (Backup, Update, or Restore), which will lead to another 2 options: [C] for confirmation, and [E] for exiting.
You must also know that the [U] and [R] options require, after exit, to restart the PC and restore the default BIOS setting from the BIOS Setup Menu.
This said, all you need to do is follow the link below and download the BIOS zip file.