Norton Anti Virus 10.1.1 (002)

I downloaded Norton for Mac a few years ago when I got an iMac G5 (Power Pac), I think 2005.

 

Recently I have been getting error messges when starting up that certian extensions can't be found or not available.

 

I haven't been billed each year by Norton, so I presume there was no annual subscription in place....can't remember what I did at the time.

 

How do I log into Norton so it can check what I have installed and correct it, or is it better to download the latest version?

 

If so, will it uninstall the existing version automatically?

 

John