Universal serial bus (USB) ports are convenient peripherals that allow your computer to interface with a multitude of external storage devices and gadgets. However, you may want to change your USB power settings to restrict access to your computer or to conserve battery power. Windows' Device Manager utility allows you to control and manage several aspects of your internal devices, as well as customise the power settings of your USB ports.
Open the "Device Manager" from the "Control Panel," located in the "Start" menu. From the Control Panel, you can either click directly on "Device Manager" or click on "Hardware and Sound," and then click on "Device Manager" from the items listed.
Expand the tree labelled "Universal Serial Bus controllers" by clicking on the arrow next to that label. Here, you will see a list of currently installed USB ports and controllers.
Right-click on the "USB port Hub" you want to change, and then click on "Properties." Under the "Power" tab, you can see the power output for that USB port.
Click on the "Power Management" tab, and then choose the power settings you want using the check boxes next to each option. Click on "OK" to save your changes.
Repeat this process for each USB port hub you want to change.
If you turn off power to a USB port, be sure to turn it back on if you want to use that port to operate USB devices.