F 3. In the Device Manager, locate and expand the Universal Serial Bus controllers item. Right-click on USB Root Hub and select Properties . USB Power Management 4. In the USB Root Hub Properties dialog, select the Power Management tab. Un-check the box next to Allow the computer to turn off this device to save power . Repeat steps 3 and 4 for each USB Root Hub item in the Universal Serial Bus controllers list. Vision MINI Smart Camera Guide F-3