How to install Norton Internet Security 2009 on Windows 7

How to install Norton Internet Security 2009 on Windows 7? When I put into the CD, the following message shows "This product requires Windows XP or Windows Vista and setup will exit"?

There is 2 month Norton Internet Security comes with the computer when I bought it. Do I need to uninstall the old one in order to install the Norton Internet Security 2009 on CD?