Razer BlackWidow V4 75% Firmware Updater | RZ03-0500

Updated: 26-Jan-2026 | Answer ID: 20595
This is a guide showing the latest version of the Razer BlackWidow V4 75% firmware update and how to install it successfully.

Applicable Models:

Firmware updater v1.2.1_r1

  • https://rzr.to/1xzgbo | January 8, 2026

  • Fixed the system's inability to enter sleep mode when Razer Synapse for Mac is running

  • Fixed intermittent keyboard lighting color flashes disrupting Dynamic Lighting.

STEP-BY-STEP PROCESS

Before you start

  1. If using a laptop, ensure it is plugged into a wall outlet. Do not let it run on battery alone.

  2. Save all files and close all programs.

  3. Download the latest firmware updater.

Update Process

  1. Run the updater.

  2. Click "Yes" if the User Account Control window pops up to proceed.

  3. Click "NEXT" to proceed. The updater will close all running Razer applications.

  4. Connect the device to PC then click "UPDATE".

  5. Wait until the update process is complete. Do not interrupt.

  6. Click "CLOSE" once the update is complete.

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