Otherwise, you will need to download many utilities (including DISM) and use the command line.

If you really want to install Windows 7 on a fairly capable external hard drive or USB key, you'll need to use third-party software. Install Windows 7 on USB support with WinToUSB Setup does not support configuration of or installation to disks connected through a USB or IEEE 1394 port.Ģ. Windows cannot be installed to this disk. If you click on this error, it will be clearly stated that Windows 7 cannot be installed on USB support. Windows can't be installed on drive 1 partition 1. If you try to install Windows 7 on an external hard drive or on an USB key plugged into an USB 2.0 port, the Windows 7 installation wizard will display this error :

Booting Windows 7 from an USB 3.0 port is not supportedġ.

Install Windows 7 on USB support with WinToUSB.

Cannot install Windows 7 on USB support.

However, you can still do this using a specific program. If you try to install Windows 7 on an external hard drive or USB key, you will quickly see that this is not officially possible.

Wintousb cannot select boot partition