USB Hub: Hub cannot be installed or does not provide enough power
"The hub was installed correctly without any problems as a 'Generic USB Hub'.
Devices such as Camcorders or Scanners connected to the hub do not work
and you get the error message "USB Hub Power Exceeded" in Windows XP."
Use External Power Adapter, 5 VDC, 500mA
The hub cannot provide enough power to operate devices which require a
large amount of power. An external power adapter (not included) must be
used. Any universal power adapter (5 VDC, 500 mA from RadioShack) will