How to Enable USB Power


Universal serial bus, or USB, is a peripheral component that plug-and-play devices use to connect to and communicate with the computer. The basic input/output system, or BIOS, enables you to change how USB behaves after the computer boots. You can turn the USB controllers on or off to enable or disable USB support, or you turn USB legacy support on or off to allow or disallow the use of USB keyboards and mice at startup.

If USB devices fail to work after powering on the computer, the USB controllers could be disabled in the BIOS. Re-enabling USB support returns function to the USB ports.

  • Turn on the computer. Check the boot screen for the message "Press the <N> key to go to Setup."

  • Press the setup key as shown on the screen to go to the BIOS Setup Utility. Use the directional keys to go to the "Advanced Options" or "Integrated Peripherals" menu.

  • Press "Enter." Highlight "USB Controllers." Use the "PgUp" and "PgDn" or "+" and "-" keys to change the option to "Enabled."

  • Highlight "USB Legacy Support." Use the "+" and "-" or "PgUp" and "PgDn" keys to change the option to "Enabled."

  • Go to "USB 2.0 Support," and change the option to "Enabled." Press "F10" to save and exit the BIOS. Plug a peripheral device into one of the USB ports to test if the USB ports are receiving power.

Tips & Warnings

  • The BIOS varies from computer to computer. Check your PC's or motherboard's manual if you need further assistance navigating the BIOS Setup Utility.
  • In some BIOS programs, the available settings for the "USB Controllers" option are "USB 1.1," "USB 1.1 + USB 2.0" or "Disabled." Select "USB 1.1 + USB 2.0" from the available settings.


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