Does not see usb 4,2,4

good day. there is a question. my pixhawk 6x Holybro does not see usb QGC .4,2,4 version. help who knows. for windows 7/ 64 bit. me first time.

Does the Pixhawk COM port show up in device manager? Does it show up when it is in bootloader mode, so in the first 5 seconds when you connect it?