As a admin we have to set admin password for tight vnc server to restrict users from changing vnc settings, but what if we forget the admin password ??? Don't worry it's very simple.

Go to All Programes >> Tight VNC ... as shown below  select Offline Configuration.



Select Administration tab from below window and there you can remove admin password easily.


After disabling password you need to restart the vnc service, since it's password protected previously you cannot restart the service from notification area, so you have to stop and start the vnc service from All Programes >> Tight VNC Server


Now try clicking the Tight VNC icon on the tray to test.