Dev may be right here, but we can try some things…
The first thing you should do is remove any and all drivers you may have installed to operate your proxmark3 from Windows… yank 'em out.
The next thing you need to do is see if your proxmark3 is responding at all as a virtual com port when the button is held down during boot… if so then you may have a way out. To test this, open the device manager and expand Ports and watch as you hold the one and only button down while plugging in your pm3 to USB, and then keep holding it down for at least 10 seconds.
I personally use this switchable USB cable for making quick connect / disconnect easier with USB devices…
If you see a new COM device show up in your device manager under Ports then you have a chance. Next you need to set up ProxSpace so you can pull down and compile the latest RRG / Iceman firmware. Follow the steps in this thread to set up ProxSpace, get the firmware source code, and compile it.
Once you have the compiled firmware, deploying it to the pm3 will require some fancy button work, but it should be possible if you can see a COM port show up when holding down the button and connecting the USB cable.