ShellRunas.exe (SysInternals)

Launch a program under a different user account (typically an Admin level account).

Syntax
 shellrunas [/netonly] program arguments
 shellrunas /reg [/quiet]
 shellrunas /regnetonly [/quiet] 
 shellrunas unreg
Key
 program Run program with specified credentials and parameters
 /netonly Use if specified credentials are for remote access only
 /reg Register ShellRunas shell context-menu entry
 /regnetonly Register Shell /netonly context-menu entry
 Note: a command prompt will flash when the program starts
 /unreg Unregister ShellRunas shell context-menu entry
 /quiet Register or unregisters ShellRunas shell context-menu entry without result dialog

Examples

C:\> shellrunas.exe photoshop.exe

"If NumLock is on, pressing a key on the numeric keypad while holding SHIFT overrides NumLock and instead generates an arrow key" ~ OldNewThing

Related commands

PsExec - Execute process remotely.
RUNAS - Execute a program under a different user account.
How-to: Run with elevated permissions
How-to: Logon Types - Windows Logon types.
Equivalent VBScript: ShellExecute method
Aaron Margosis - Running with least privilege, archived blog (2004-2019).