Applicable Model:
MCU Updater v1.04
- https://rzr.to/fkxo42 | May 4, 2026
- Fixed the issue “After exiting Synapse, KB lighting effect turns off after a few seconds.”
- Fixed the issue where “break” was not triggered after releasing the Fn key.
STEP-BY-STEP PROCESS
Before you start
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Ensure Windows is up to date. See How to get the latest software and driver updates from Windows.
If you just updated Windows, install the "Optional updates" under Settings > Windows Update > Advanced options.
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Plug the Razer Blade into a wall outlet. Do not let it run on battery alone before proceeding.
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Save all files and close all programs.
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Download the latest firmware updater.
Update Process
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Run the updater.
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Click "Yes" if the User Account Control window pops up to proceed.
Important: If the Razer Blade Updater window appears with details regarding your current update version and the version that your Razer Blade laptop will be updated to, do not run Windows Update.
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Click "UPDATE" to initiate the update process.
Note: Control of your mouse and keyboard during the updating process will be lost temporarily. You will not be able to proceed if you already have the latest software installed.
A progress bar will appear indicating the status of the installation process. During installation, you will not be able to access other applications.
The Razer Blade will restart a few times and will automatically boot to Windows once the update is complete.
Important: Do not force restart or shut down the Razer Blade during this process.
