Multiple Instances Windows

I need help installing multiple instances on windows server.

Any help will be appreciate,

Than you and have a wonderful day to all

I do not believe there is a native way. You could try running Docker for Windows and have containerized instances from there.

You can only install one Orthanc service but you can start any orthanc instances with a command line:

START Orthanc.exe --verbose configWinA.json
START Orthanc.exe --verbose configWinB.json

Make sure they use different ports and storage folders.