Heya Hajo,
it should be Control Panel>Device Manager>Universal Serial Bus Controllers>USB Root Hub
when you click the + or little arrow beside "Universal Serial Bus Controllers" at the bottom to expand it, you should see all your USB Root Hub entries in device manager
right click each USB Root Hub and check the following tabs under properties:
Properties
General Tab : status: Device is working properly
Power Tab : Hub information: hub is self powered Total Power Available: 500mA per port
Advanced Tab : Hub information: Hub operating at full speed
Power Management Tab : USB Root Hub NOTE* make sure no boxes are checked, especially the one that says "allow the computer to turn off this device to save power"
as for what your external powered hub shows up as or reads, I can not help ya, I have never bothered to use those.....
Hope this helps, Bro...... Good Luck
edit: seems you posted while I was typing this
TC