The installer sets this property if the user has administrator privileges.
Windows Server 2008 and Windows Vista: The AdminUser property is the same as the Privileged property. Authors should used the Privileged property. The installer sets these properties if the user has administrator privileges, if the application has been assigned by a system administrator, or if both the user and machine policies AlwaysInstallElevated are set to true.
The differences between these properties may have been used in some legacy packages. For example, AdminUser may have been used instead of Privileged in conditional statements, because the installer only sets the AdminUser property if the user is an administrator. The installer sets the Privileged property if the user is an administrator, or if policy enables the user to install with elevated privileges.
Windows Server 2008 and Windows Vista: Not supported. The Privileged and AdminUser are the same. Packages that require distinct Privileged and AdminUser properties can restore the difference by setting the MSIUSEREALADMINDETECTION property.
For more information, see Installing a Package with Elevated Privileges for a Non-Admin, and Privileged property.
Windows Installer 5.0 on Windows Server 2012, Windows 8, Windows Server 2008 R2 or Windows 7. Windows Installer 4.0 or Windows Installer 4.5 on Windows Vista or Windows Server 2008. Windows Installer on Windows Server 2003 or Windows XP. See the Windows Installer Run-Time Requirements for information about the minimum Windows service pack that is required by a Windows Installer version.