Unknown USB device

[e36Adz]

I've recently formatted and installed Win 8.1, done all windows updates and everything is running fine however, this little thing in device manager is bugging me...

My spec is in sig. Any idea what I need to install to get rid of it?

 

[Terminal_Boy]

Have you got a non-USB 3.0 device plugged into a USB 3.0 port?

I had my PC in bits the other day to replace the PSU and had exactly this issue when I powered it back up with all the USB cables plugged in.

I turned out that I had my TrackIR (USB 1.0 I think) plugged into a USB 3.0 port.

 

[e36Adz]

Ah, it just so happens that I recently tidied my case a little as I fitted a new hard drive and gfx card. So some things may have been disconnected and reconnected in the wrong place, gonna check now...

EDIT: And that indeed was it, thanks.