May cause problems with your peripherals
How to turn USB power on or off when the computer is turned off
To save power, Windows automatically turns off power to USB ports. It certainly saves power, but what if it causes problems with your auxiliary devices or you just need a USB device that always has power?
Power management is also a common cause of problems with USB devices. If Windows can shut down your USB controller, it can sometimes also prevent it from booting properly. This causes some USB devices (particularly scanners, cameras, and some phones, such as Blackberry) to stop working.
To prevent Windows from "managing" power to your USB controller or devices, follow these steps:
