Right-click the Norton icon in the system tray located in the lower right corner of your computer screen and then click on Open Norton Protection Center

Click the Norton Internet Security tab

Click the yellow bar that says "Settings"

Click the item that says "Personal Firewall"

Click the button that says "Configure" (Note, you can disable the fireall by clicking the "Turn Off" button, and then selecting a period of time to leave disabled.

On the left side column, click the item called "Program Control". Scroll through the list of programs until you find "WebConference Plug-in"

Click on the combo boc under "Access" next to the WebConferencePlugin item and choose "Allow" and then click OK. Continue clicking OK until you return to the Protection Center and close it. You can now enter the conference room normally.

In earlier versions of Norton, you open Norton Internet Security, click "Status & Settings", then click "Personal Firewall", and then "Configure"

Click the "Programs" tab at the top. Then search for WebConference Plug-in in the list and change it to "Permit All".