I don’t think I’ve installed anything important over the past few days when this must have happened, will just deleting that driver cause any issues that you know of?
And can I just simply delete it from system32/drivers or is there some complex process I need to do?
Nevermind, I figured out how to remove it and everything is working now!
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aka Google.
Just thought I’d throw this in here as I have spent the night figuring this out trying to get my code to successfully program onto the board.
First time user of proffie so have followed the how to guides and a few videos.
My specific problem was that there was another driver installed on my machine which was preventing the driver STM32 BOOTLOADER to be selected. I was getting a “driver installed” message from zadig. I then checked the driver and the existing driver was not replaced by the one zadig just installed!
The problem driver was one from Thrustmaster (guistdfudev). luckily the uninstall process was easy and I just searched my apps and uninstalled it.
The new issue I had was multiple instances of the STM32 BOOTLOADER installed as well as installing it to the serial and thinking I had really screwed up. The fix for this was running terminal in admin and then running this command
Dism /online /Get-Drivers /Format:Table
This will list all the drivers installed on your machine. you can then uninstall any driver in the list by running changing the Published Name with the name of the driver.
pnputil /delete-driver /uninstall /force
Once I did this I went through the steps again and it all worked.
Just want to extend my gratitude to prof and everyone else that’s made video tutorials. It’s an awesome platform excited to finish my build. I have made my own 3D printed chassis for proffie which people are welcome to if they’d like a copy 
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Yeah, the guillemot drivers are infamous in the STM32 development space at large, not just Proffieboards.
Glad you got it sorted, and with a few extra tricks along the way!
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Late to the game, but……literally first time with all of this and the driver install went flawlessly. Thank you for all your hard work. Much appreciated!