WinToUSB 6.0 Release 2 is a free application that can be used to clone a Windows operating system to a USB drive and create a Windows operating system that can run completely on USB storage including flash drives or other external storage. Apart from that, using this application you can also clone or copy Windows 10 from internal hard disk to external hard disk including flash drive, and ensure that the operating system can be booted from USB on any computer.
WinToUSB Enterprise full version serial number only supports making Windows 10 / 8.1 / 8/7 bootable, so it doesn't support making Windows XP bootable. The interface of the latest WinToUSB software is also very easy to understand, just select the source of the ISO file from which folder, and select the target flash disk that you want to make the windows bootable, click start and wait for the process to finish.