Destination PC - A PC that you'll install Windows on. Connect the USB flash drive to your technician PC. Open Disk Management: Right-click on Start and choose Disk Management. Format the partition: Right-click the USB drive partition and choose Format. Select the FAT32 file system to be able to boot either BIOS-based or UEFI-based PCs. FAT32 has a file size limit of 4GB If your WIM image is larger than 4 GB, see If your Windows image is larger than 4GB below. Set the partition as active: Right-click the USB drive partition and click Mark Partition as Active. If Mark Partition as Active isn't available, you can instead use diskpart to select the partition and mark it active. Use File Explorer to copy and paste the entire contents of the Windows product DVD or ISO to the USB flash drive. Optional: add an unattend file to automate the installation process. For more information, see Automate Windows Setup. Connect the USB flash drive to a new PC. Turn on the PC and press the key that opens the boot-device selection menu for the computer, such as the Esc/F10/F12 keys. Select the option that boots the PC from the USB flash drive. Windows Setup starts. Follow the instructions to install Windows. Remove the USB flash drive. Copy everything except the Windows image file (sources\install.wim) to the USB drive (either drag and drop, or use this command, where D: is the mounted ISO and E: is the USB flash drive.). Split the Windows image file into smaller files, and put the smaller files onto the USB drive:. Windows Setup automatically installs from this file, so long as you name it install.swm. You can use installation media (a USB flash drive or DVD) to install a new copy of Windows, perform a clean installation, or reinstall Windows. To create installation media, go to the software download website, where you'll find step-by-step instructions.