How do I update the firmware on the Corsair Harpoon Wireless Mouse?
Applies to: Corsair Harpoon RGB Wireless Optical Gaming Mouse
Last updated: September 2025
Problem
Outdated firmware can cause connectivity issues, reduce performance, or prevent new features from working correctly on the Corsair Harpoon Wireless Mouse. Without firmware updates, you may experience lag, unresponsive buttons, or battery-related problems.
Solution
You can update the firmware for the Corsair Harpoon Wireless Mouse using Corsair iCUE software on your PC. Updates are delivered directly through iCUE and applied when the mouse is connected.
Step-by-step instructions
Preparing for update
- Make sure your mouse is at least 50% charged or connected in wired mode via USB cable.
- Download and install the latest version of Corsair iCUE software from the Corsair website if not already installed.
Updating the firmware
3. Open the iCUE software on your PC.
4. Select the Corsair Harpoon Wireless Mouse from the device list.
5. Go to the Settings tab.
6. Look for the Device Firmware section.
7. If an update is available, click Update.
8. Wait for the update process to complete — do not disconnect the mouse during this time.
Final steps
9. Restart iCUE after the update.
10. Test the mouse to ensure all functions (movement, clicks, DPI switching, wireless connection) are working correctly.
Optional methods or tools
- Manual firmware update: Some versions of iCUE allow importing a firmware file from Corsair’s website if auto-update fails.
- USB wired mode: Recommended for a more stable update process compared to wireless.
Best practices or tips
- Always update over a wired USB connection to avoid failures during the process.
- Keep iCUE software up to date to receive the latest firmware notifications.
- Don’t interrupt the update — disconnecting the mouse may cause it to stop functioning until re-flashed.
- Check for firmware updates periodically if you notice unusual behavior.
