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Dell Command | Configure Version 3.0 Command Line Interface Reference Guide

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--usbports

Valid Argument enable, disable, enablebackonly
Description

Enables or disables user accessible USB ports.

If set to enablebackonly , it enables BIOS emulation of all supported USB devices except for bootable devices (floppy, USB flash, and so on). This is a security feature that will prevent users from inserting a USB boot device and booting an operating system from it. Non-bootable devices (keyboard, mouse, and hub) are still emulated.

Example 
C:\>cctk --usbports=enable
                                                      usbports=enable

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