WinToUSB 8.2

WinToUSB allows you to install and run a fully-functional Windows OS on an external hard disk or USB flash drive. It can accept Windows installers from ISO, WIM, ESD, SWM, and VHD(X) files, or from CD/DVD drives. You may also clone the currently running Windows to a USB using this tool. WinToUSB lets you bypass Windows 11 system requirements, such as TPM 2.0, Secure Boot, Minimum hardware, and Microsoft accounts.

Even though you can install any Windows variant, Windows To Go only works properly with Windows 8, 10, and 11. Windows 7 is not completely portable - it may or may not work depending upon the hardware.