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Why do you need to do this from the command prompt? Microsoft created a tool to boot from USB drives to install Windows. Why not use that. It has been around since Windows Vista if memory serves me. try to learn new staff. P.S Microsoft USB/DVD Download Tool sucks. it was stuck on burning progress ...

As to what I've read in the internet, beginning with Windows 7 isoburn.exe is on board. isoburn /Q D: "C:\somewhere\foo.iso" ... where D: represents the drive to burn the image. Not sure what requirements your USB drive has to meet though. Steffen never thought there was a built-in burning feature ...

Hi,

Anyone knows how to burn .iso image (Windows 7) on an external USB drive? The USB should be bootable as I need to reinstall the OS.