Activation

I have a new laptop which has Norton installed but which I have never activated.  I have purchased a new 3pc version of NIS and it is suggested that I download the most up to date version of NIS from the website and activate using the Product Key supplied with the CD.  Should I uninstall the NIS already installed (and which is presumably some months old by now) and if so should I be using the Removal Tool for this purpose rather than using the Windows 7 uninstall programs option.

 

Thanks.