Fixed but tried all these steps, solution at bottom; thank you for putting me on the right track 
I’ll work through the steps, used a dozen wires connected to both USB and USB-C… i showed in the video using the exact cable that worked with my SpeedyAIO caused nothing to be detected.
Ive used ports on both the Motherboard and front panel of my PC, ive tried with and without hub.
Ive put it into DFU mode and it makes no difference except the red LED is on constantly. It never shows in device manager as anything. I have added and removed drivers, restarted and nothing changes.
I have also tried this on a laptop and it doesnt show up there either; it powers up, the LED’s flash regardless of computer and its always showing on wifi ELRS.
- make sure you are pressing the right button, rx boot isnt dfu. Even then nothing showed up
2.Device manager, view, show hidden devices - Remove all instances of STM32 DFU devices and on the last one uninstall the driver as well.
- Reconnect pressing the right button and it then shows up in Device manager, betaflight cant autodetect the board, and you want to install FLYWOOF405S_AIO firmware, there is no pro version