That sounds like a driver or device is disconnecting and then reconnecting. Possibly a USB device is sleeping and waking or a bit dodgy.
You can keep using it if you want, you just have to go into device manager settings and disable the hub's option to go to sleep.
Try turning the option about power mangament in the USB hub I thought was relevant and no effect. There are are 9 other "USB root hub" entries under "Universal Serial Bus Controllers" - how do I choose the right one!
Mel
By unplugging with Device Manager open, the offending device is called a "USB Composite Device" - and has no tab about sleep or power management! So stuck.
Ahem - probably yes - the Logitec dongle! It's easier just to turn the "System" volume down rather than waste both of out times! Thanks, Mel