On the boot menu, under UEFI boot, select the USB recovery drive and press the Enter key.At the Dell logo screen, tap the F12 key until you see the Preparing one time boot menu in the top-right corner of the screen.Connect the USB recovery media to the Dell computer where you want to install Microsoft Windows 8.1 or 7.That USB flash drive /dev/ is provided as an output file to the dd tool. Use the cat partitions command to find out the /dev/ assignment for the inserted USB flash drive./dev/sdX is the drive assigned by Linux computer to the USB flash drive, it could /dev/sdb, /dev/sdc etc.my_usb_image.iso or the my_usb_image.img file is the unzipped recovery image file downloaded and provided as input file to dd tool.login: $ dd if=my_usb_image.iso of=/dev/sdX bs=4M.On Linux, this can be done like the example shown below: The OS recovery image is meant to be flashed to a raw device (I.e., no partitions).Follow the instructions to install the operating system using the Dell OS recovery media.Once the recovery image is copied to the USB flash drive, safely remove the USB flash drive from the computer.Click Make Startup Disk to install the recovery image to the USB flash drive.In the tool, select the USB device that is plugged in.Insert the USB flash drive in your Linux-based computer where the recovery image is downloaded.Verify that the USB flash drive used for imaging is at least 16GB in capacity.Creating a bootable USB recovery media formats the USB flash drive and all the data on the USB flash drive will be lost permanently. Warning: Dell recommends that you back up any important data from the USB flash drive.
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