Click Start.
Right-click My Computer.
Click Properties to open the System Properties window.
Click the Hardware tab.
Click the Device Manager button to open the Device Manager window.
If necessary, double-click the Universal Serial Bus controller branch to expand it.
Right-click USB Root Hub.
Click Properties to open the USB Root Hub Properties window.
Click the Power Management tab.
De-select Allow the computer to turn off this device to save power check box.
Click OK to close the USB Root Hub Properties window.
Close any other open windows.