FlashBoot is a tool which can make a copy of your Windows OS (including all software and your data) on a USB thumbdrive or USB HDD and instantly transfer an entire OS to another computer, even with dissimilar hardware. It is a freeware USB imaging application that's well-designed, advanced, modern and wizard based.
Here are some screenshots to illustrate the features and user interface of this application:
TreeSize Professional
WinToUSB
SARDU
MeinPlatz
WizTree