题目内容

You have a computer with a USB keyboard that is running Windows 2000 Professional. You install a USB scanner on this system. The system asks for the driver and you install them. After you restart your computer， you notice that the keyboard doesn’t work anymore. What should you do in order to make both， the keyboard and the scanner work？（）

A. Update the scanner drivers using certified drivers
B. Enable the USB port in the computers BIOS
C. USB keyboards DO NOT exist
D. Enable the USB hub controller
E. Reinstall the USB device driver and disable the USB error detectio

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