Sorry to be so slow over in Hangman, Krissy! I was baking cookies for the Sunday school kiddos. Here's what I wrote over there:
As long as you haven't opened it yet, Krissy, I would take it back. As long as the newest version is available and you haven't even opened the older version you might as well. Honestly, I wouldn't use Norton, though. It's a memory hog and slows your computer down. AVG is far better and doesn't bog your computer down. You can either use the free version (which is what I do) or purchase the pro version. AVG gets the "Spectacular" rating from CNET, which is their highest rating - and they're very trustworthy.
Here's the link for the free version:
Now, when you get to that page, click the green "DOWNLOAD NOW" button. Once the new page loads, a popup will appear - that's what you'll need to click to download the file. If you have any trouble with it, just PM me and I'll be glad to walk you through it.