To check power draw of the USB devices connected to your computer:
- In the Start menu search field, type: Device Manager and press the Enter key
- In the Device Manager window, expand the node Universal Serial Bus controllers
- Double-click on one of the USB Root Hub entries.
- Click the Power tab.
This tab displays a listing of attached USB devices, how much power they use and how much is available. If you have more USB devices then you have available ports or power. Consider buying a power USB hub that uses energy from the wall socket and not your computer's motherboard.