Firmware updates for Mesa 3 Windows

11 Nov 2022

Firmware updates for the BIOS (UEFI) and EC (Embedded Controller) are available for Mesa 3 Windows model units. For details regarding changes in each version, see the release notes documents. Some details for this specific update are also provided at the web page.

NOTE: If your unit has not been updated for a long time, you may first need to install our previous OS patch 22039 before you can install this latest firmware. Also, if you are using BitLocker you may need to have a recovery key to use after the firmware is installed. For more information, see Finding your BitLocker recovery key in Windows.

WARNING: The installer below is for Mesa 3 Windows model units and some OEM brand models that do not have pre-installed firmware customizations. If a different brand appears during boot on the unit, please contact that brand partner to obtain the custom firmware update. If you are unsure where to obtain the custom firmware for your brand and model device, please contact for assistance. Also, you must follow the instructions below exactly as written. Failure to follow these steps could result in the unit needing to be shipped to a certified repair center for servicing.


NOTE: If you have EC version 1.21 installed currently, a known minor issue may cause a slight chance that the unit will get stuck during update. If this occurs, you may need to remove the battery to drain the system before attempting again. If you have the optional internal battery, you may need to leave the unit running overnight to drain the internal battery before then attempting to update again.

Installation instructions:

  1. Attach a stable external power source (such as the 30W wall charger that was provided with the unit).
  2. Download and copy the above M3Updater_UEFI_148_EC_128.exe file to the Mesa 3 Windows unit.
  3. Remove any external storage device (USB media) that you may have attached to the Mesa 3 or dock.
  4. Save and close any open files and running programs. Backup any critical data from the Mesa 3 before proceeding as a precaution.
  5. Run the M3Updater_UEFI_148_EC_128.exe file on the Mesa 3. When a black terminal (command prompt) window appears, you may need to press the Return keypad button or an on-screen keyboard button to continue.
  6. Wait while the app starts the update process which might involve multiple Restarts (or reboots). After each Restart the update app will be automatically launched.
    Note: If you have a pin or password set up, you may need to enter it after each Restart and wait 10-15 seconds to continue.
  7. It should take up to 20 minutes to update the firmware from an earlier version. When the app stops performing updates, follow the on-screen prompts.
  8. Verify that the firmware has been updated successfully by tapping on the Windows (Start) button > Device Info to check that the BIOS Version (UEFI) is now 1.48 as well as the Embedded Controller (EC) version is now 1.28 in that window.

If you have mistakenly loaded the wrong brand firmware or need to reload the latest firmware again for some other reason, you can attach wall charger and launch Command Prompt in Admin Mode to run the command “M3Updater_UEFI_148_EC_128.exe /uefi” or similar. If further troubleshooting is needed, please see this document.


After installing this firmware update, you will also need to install the latest OS patch from the following web page.

Mesa 3 Windows cumulative OS patch update 22292