![Zadig Drivers for Cleanflight/BetaFlight STM32 Flight controllers (DFU Mode) - Unmanned Tech UK FPV Shop Zadig Drivers for Cleanflight/BetaFlight STM32 Flight controllers (DFU Mode) - Unmanned Tech UK FPV Shop](https://media.unmannedtechshop.co.uk/wp-content/uploads/2018/12/18122246/blogs_posts-firmware-flash.jpg)
Zadig Drivers for Cleanflight/BetaFlight STM32 Flight controllers (DFU Mode) - Unmanned Tech UK FPV Shop
![All of a sudden BetaFlight: Failed to open serial port, when trying to repair ImpulseRC: the port 'COM7' does not exist. And I can see COM 7 in BetaFlight right now. FC All of a sudden BetaFlight: Failed to open serial port, when trying to repair ImpulseRC: the port 'COM7' does not exist. And I can see COM 7 in BetaFlight right now. FC](https://preview.redd.it/806jxpy9d7d41.jpg?width=640&crop=smart&auto=webp&s=5342174be5072fd3956e548d9ff96fd3b5a0a776)
All of a sudden BetaFlight: Failed to open serial port, when trying to repair ImpulseRC: the port 'COM7' does not exist. And I can see COM 7 in BetaFlight right now. FC
![Fix any STM32 DFU Drivers issues when flashing Betaflight/Cleanflight firmware - Guides - DroneTrest Fix any STM32 DFU Drivers issues when flashing Betaflight/Cleanflight firmware - Guides - DroneTrest](https://www.dronetrest.com/uploads/db5290/original/2X/9/9af155b2942687275fd65dfde961b0c2e113321e.png)