How to Disable USB Power Management
Power Management allows Windows to disable power output to devices after a set amount of time. This process is used to save energy and is especially helpful for laptops, as it helps promote a longer battery life. While this process generally works well for monitors and internal hard drives, it can cause problems for some USB devices. It can also cause USB devices that were connected during sleep mode to not be recognized until the computer restarts.
Press the "Windows" key and "R" key simultaneously. A "Run" box appears.
Type "Devmgmt.msc," then press "Enter." This loads the Device Manager.
Double-click on "Universal Serial Bus controllers."
Double-click on "USB Root Hub." You may have more than one "USB Root Hub" listed in the Device Manager. Double-click on any one of the "USB Root Hubs."
Click on the "Power Management" tab.
Uncheck the box next to "Allow the computer to turn off this device to save power."
Push the "OK" button and close the "Device Manager."
Repeat steps four through seven if you would like to disable multiple "USB Root Hubs."