USB Hub Power Exceeded
If you see this message when connecting USB devices to the Targus USB Docking Station, even the humble mouse, You may need to update your Citrix Receiver driver. Not sure you have such, then check Control Panel\All Control Panel Items\Programs and Features for the Citrix Receiver. Some driver versions have a bug in the driver that causes the USB hub ports to work at 100mA instead of the full rated output. Updating the driver from the Citrix website will resolve this issue. This only affects external USB hub ports, and not the laptop USB ports, so you will only see it when connecting peripheral devices via a USB docking station or USB hub.