WinToUSB is the best free Windows To Go Creator that allows you to install and run Windows 10/8.1/8/7 on an external hard drive or USB flash drive, or you can clone current Windows 10/8/7 installation to a USB drive as a Windows To Go Workspace. WinToUSB also supports creating a Windows installation USB flash drive from a Windows 10/8.1/8/7/Vista/2008/2012/2016 installation ISO file, so you can install Windows from the USB flash drive easily.