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What to do if the operating system does not recognize the usb device

  
1. Right click on “Computer” and select “> Management” under the list that appears on the right. 2. Click to open the “Device Manager” under Computer Management.
3 In the “Device Manager”, click “Universal Serial Bus Control”, in the “USB Root Hub” device list below, right click on “USB Root Hub” and turn it “disabled”. After the menu, “ enable & rdquo;;

4, after completing the above operations, then insert the u disk into the computer to try, no need to restart the computer.

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