Pimax STM Device DFU misrecognized as Guillemot STM DFU Device.


Recently, our users reported that automatic upgrade is unsuccessful on the latest Pitool version and installation stuck in DFU mode.

At present, it can be determined that the Guillemot STM DFU Device (conflict on Sim Racing Steering). Locate and delete the Guillemot software driver, it will allow Pimax DFU device returns to normal.

Steps :


1.Delete these 2 folders

C:\Program Files\Guillemot

C:\Program Files(x86)\Guillemot

2.Go to Device Manager, uninstall the Guillemot STM DFU Device.

3.Install "stm_dfu_3040_63.exe" from pitool path "C:\Program Files\Pimax\Runtime\dfudriver" 

4.Restart PC

5.Launch Pitool and check firmware update.