To start the Secondary Logon service
In the Name column, click Secondary Logon.
On the Action menu, click Start.
To open Services, click Start, click Control Panel, click Performance and Maintenance, click Administrative Tools, and then double-click Services.
The Secondary Logon service allows you to run programs (*.exe), saved Microsoft Management Console (MMC) consoles (*.msc), shortcuts to programs and saved MMC consoles, and Control Panel items as an administrator, even while you are logged on to your computer as a member of another group, such as the Users group or the Power Users group.
By default, the Secondary Logon service starts automatically when the system starts. For more information about how to configure startup options for services, see Related Topics.
The runas command allows a user to run specific tools and programs with different permissions than the user's current logon provides. For more information about this command, see Related Topics.