disable mouse/keyboard remotely for vnc
If you are using UltraVNC, go to the Admin Properties page on the host/server computer, then check the box labeled "Disable Local inputs" under Keyboard & Mouse.
Or, when connected to a computer where both are using UltraVNC, you can use the button at the top of the connection window that looks like a computer monitor (mouse over it and you get a message "Toggle Remote Input and Remote Blank Monitor (On/Off) to temporarily disable the mouse, keyboard, and monitor of the remote computer.
If you are using RealVNC, go to the VNC Server Properties page on the host/server computer, click on the Inputs tab, then check the box "Disable local inputs while server is in use".
I'm not sure where the setting is in TightVNC since I don't have any computers running it right now.
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