In Windows Vista, you had the ability to Run a program as an Administrator. But to run programs as a different/another user, you had to use the command line. In Windows 10/8/7 however, you can now perform both actions: Run as an Administrator or Run as different user, easily.
Run as different user
To Run a program as a different user, simply press Shift key and right click on the shortcut or executable you wish to Run as different user.
From the right click context menu, select Run as different user.
On Windows Server 2008 however, Shift+Right-click does not offer the option Run as a different user! It is offered in Windows 7 and Windows 8 too. It was also offered in Windows XP, but not in Windows Vista.
If you wish you can add this Run as different user command permanently to your regular right-click context menu by downloading and running ShellRunAs from Microsoft. This Runas utility is handy for launching programs under different accounts, but it’s not convenient if you’re a heavy Explorer user.