It is quite easy to start multiple instances of the same app with administrator privileges!
First, open the desktop application that you want to run in multiple instances / windows. It does not matter how you start it: from the desktop, the Start menu or the Start screen in Windows 10, or 8.1, the taskbar, or the command prompt. After opening, the icon will appear in the system tray. And then it works very easy!
1.) ... To open multiple instances of the same app with administrator privileges!
2.) ... Does this start as an administrator for all Windows apps?
3.) ... What should I consider in app with administrator permissions?
See also: ► How to change the administrator in Windows 10?
as with a right-click ► Run as Administrator), the procedure is the same, with a small difference: Hold down the CTRL key, Shift key on your keyboard and click on the tray icon of the / of that app / program that you want to run as administrator in several instances. this also is UAC prompt triggered and you have to press Yes to the new instance in Admin mode can be executed.
It works via the taskbar, right-click, Windows 10 Run dialog, Windows Start, Windows search
See: ► Opening a new program instance!
The above explained way of working almost always works for desktop applications, which of course are designed for multiple instances. Some apps can not. Examples - Skype, most games for Windows, antivirus applications, Dropbox, OneDrive, or Windows Media Player.
Any apps that are purpose-designed for a task, most of the Windows Store, including the Windows Store itself (which is also an APP), can not run in multiple instances at the same time.
There are also malicious apps under Windows 10 for this reason, you should be careful, especially with the background APPs under Windows 10 , but you can check at any time via the Windows Task Manager , what authorization an APP, or program has
See: ► ... Check if an app is running as an administrator?