Right click on the VNC tray icon again and shut down the program.Set your VNC passwords and any other options you want and click OK.Right click on the VNC tray icon and go to Admin Properties.Go to the UltraVNC Program Files folder and run “winvnc.exe”.On the Select Additional Tasks screen, DO NOT select “Register UltraVNC Server as a system service” or “start or restart UltraVNC service”.Check UltraVNC Server + UltraVNC Viewer if you want it.Accept the defaults until you get to the Select Components screen.

I don’t have time at the moment to write up a giant all-encompassing post with accompanying pictures and what have you so here’s what you gotta’ to do: I also had issues with running the MSI installer rather than the EXE, so stick with the executable if you’re in a rush. It appears that if you check the box to install it as a service during the initial installation wizard, you will encounter the annoying “Password Not Set” error and nothing works. Trying to get UltraVNC (version 1.2.0.5) to run as a system service is a pain in the ass if you don’t follow a specific set of steps during the setup process.

Ultravnc viewer