can I have 2 instances of UltraVNC Server running on a Windows10 PC?

[daxtrajero]

in other words

User1 windows account, install UltraVNC, set port to 5901

User2 windows account, install UltraVNC, set port to 5902

I've got as far as installing User1 and have that working. I notice when I attempt to install user2, it doesn't offer me a path to install the program to and just reinstall UltraVNC over the top of the first installation.

Is it possible?

[Rudi De Vos]

You can if winvnc.exe is started with the -multi option. Just start the same exe 2x. ( winvnc.exe - multi)
Normal this is a test feature to check a new version and keeps the old running. Not supported.

Multiple viewers can connect to the same server, what do you actual want todo

[VNCHELP890]

Side question: I don't remember it happening before, but in Windows 10 task manager, it is showing more than 1 UVNC running. Was it always this way? For some reason, I am thinking it wasn't. Could I have 2 running at once accidentally?

[Rudi De Vos]

When running as service you have the winvnc.exe running in session 0 (service)
and winvnc.exe running in the desktop session

When you switch a user, the winvnc.exe running in the desktop session is stop and restarted in the new desktop session.
The service job is to monitor and restart winvnc in the current desktop session.

[daxtrajero]

You can if winvnc.exe is started with the -multi option. Just start the same exe 2x. ( winvnc.exe - multi)
Normal this is a test feature to check a new version and keeps the old running. Not supported.

Multiple viewers can connect to the same server, what do you actual want todo

I'm running Windows 10, with Ibik Aster multiseat software. 2 user accounts 'user1', 'user2', 2x keyboard, 2xmouse, 2xscreens

Users want to VPN into the network and remote control their user accounts

"You can if winvnc.exe is started with the -multi option" - do you mean, don't install UltraVNC as a service, and start it manually with the -multi option?

So I'd start winvnc.exe -multi from User1's account, and do the same for User2's account. Ideally I need these to both run when the computer starts.
User1 can remote control his desktop
User2 can remote control his desktop at the same time as above

Is this possible? Do I need to enable loopback option?