Microsoft® Windows® User State Migration Tool (USMT) version 3.0 migrates user files and settings during deployments of Microsoft Windows XP and Windows Vista. You can use USMT to perform unattended migrations and to migrate files and settings for computers with multiple users. Also, with USMT you have the ability to encrypt and compress the store. USMT 3.0 is intended for administrators who are performing automated deployments.

This tool includes two command-line tools named ScanState and LoadState. ScanState creates an intermediate store that contains the user files and settings from the source computer. LoadState restores these files and settings to the destination computer.
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TechEd, Windows User State Migration Tool, USMT