Applies To: Windows Server 2003, Windows Vista, Windows Server 2008, Windows Server 2003 R2, Windows Server 2000, Windows Server 2012, Windows Server 2003 with SP1, Windows 8 Adds or modifies user accounts, or displays user account information. Net user is a command-line tool that is built into Windows Vista. To run net user, open a command prompt, type net user with the appropriate parameters, an