@MJ1 If it shows up as COM port, then you can use it for your Pycom device.

@paul-thornton The timing is rather critical. Couldn't you extend the time window for updating to let's say 30s?

I've had Zadig be a bit fiddly in terms of getting the timing right. Ive not seen it take that long just to build a catalog. certainly not on decent hardware. On my laptop: i7 6700k, generic sdd. it was basically instant. are you seeing high cpu/io usage during those few seconds? (Admittedly it'll be hard to diagnose given the few seconds of time constraint..)