Annoying GUI Pop-up in VNC and how to disable it?

# ls -l /etc/xdg/autostart/gpk-update-icon.desktop

-rw-r--r-- 1 root root 7115 Feb 16 16:04 /etc/xdg/autostart/gpk-update-icon.desktop

Append below line in above mentioned file:

X-GNOME-Autostart-enabled=false

Once done, restart server and the pop-up shown above should be gone.