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You’ll now need to assign your USB drive a letter.Next, you’ll need to format the USB drive – type in format fs=fat32 and hit enter.You will now need to select the partition that you just created.Then you’ll need to create a bootable partition – type in create partition primary and hit enter.Next, you’ll have to clean the USB drive – to do that, type clean and hit enter.Then, you’ll need to select your USB drive – to do that, type select disk # and hit enter – you’ll have to replace the # with your disk number.After that, you will have to display the connected disks that are available – to do that, type in list disk and hit enter.Next, you’ll have to open the disk management utility using CMD (Command Prompt) – to do that, type in diskpart and hit enter.

Search and open Command Prompt as an administrator.First, make sure your USB drive is plugged in.If you don’t want to use any software, there’s another way of creating a bootable USB drive, but that’s a bit trickier. Split the Windows image file into smaller files, and put the smaller files onto the USB drive: Dism /Split-Image /ImageFile:D:\sources\install.wim /SWMFile:E:\sources\install.Create bootable USB Windows 10 Using Command Prompt If your image is larger than the filesize limit:Ĭopy 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.) robocopy D: E: /s /max:3800000000 Windows USB install drives are formatted as FAT32, which has a 4GB filesize limit. Follow the instructions to install Windows. Select the option that boots the PC from the USB flash drive. 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. For more information, see Automate Windows Setup. Optional: add an unattend file to automate the installation process. Use File Explorer to copy and paste the entire contents of the Windows product DVD or ISO to the USB flash drive. Step 2 - Copy Windows Setup to the USB flash drive If Mark Partition as Active isn't available, you can instead use diskpart to select the partition and mark it active.