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Jon Hole

Advice when performing ZerOS software upgrades

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We occasionally hear from users who are struggling to upgrade their ZerOS consoles via a USB stick.

Bootable USB devices are notoriously difficult to identify - some USB memory sticks are natively bootable, others take a little configuration, whilst some cannot be made to boot. We recommend the use of the Zero 88 branded memory stick which is supplied with the console - this stick has been tested for this purpose and our software is built around these sticks.

If you cannot use the branded memory stick, there are a couple of things you can try:

  • In the USB Install Maker, when you're on the Select Device screen, push and hold SHIFT whilst clicking the Next button:
  • The USB install maker will ask you to select OK to confirm you wish to set the Master Boot Record. Note that this can render some USB sticks unusable, so only use this if you have a dedicated stick for software upgrades.
  • Select an MBR Image ( start with A, if that doesn't work, try B )


  • Push OK and your stick will be formatted - the tool will then prompt you to remove and reinsert the stick.

After this, try running through the normal upgrade procedure and the stick should work as expected.

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