What is USMT?

Windows User State Migration Tool 4.0 (USMT)

USMT is an abbreviation of User State Migration Tool.
User State Migration Tool should be especially used for large deployments of Windows 7 OS (operating systems). User State Migration Tool (USMT) will automate the migration of deployments especially in high numbers.
USMT helps administrators or helpdesk engineers to automate the deployment of Windows 7 operating system for large numbers in scale.

USMT is a tool in the tools set that is available with the Windows Automated Installation Kit (WAIK).
For more information and download link on Windows Automated Installation Kit go to What is WAIK ?.
Or you can directly navigate to Microsoft Downloads Portal for USMT 4.0 download.