When an antivirus subscription expires, it's an excellent time to reconsider your OS selection. Here's my story...
For a while, one of my Christmas presents for my wife every year was her NortonAV re-up subscription. It was frustrating, and made me (and avid Linux evangelist) livid -- paying into the very system that I every fiber in my being was techno-morally opposed to. However.. the NAV re-up what she wanted, and it was a necessary evil as it was the one Windows box on our network that we also used for running the TurboTax CD-install from every year.
When I found that Turbo-tax could be run completely on-line now, AND was non-IE/Firefox friendly.. I asked her, "so what do you need your machine to do now if we can do taxes on line instead of buying the Windows/CD every year?"... To which she replied.. "As long as it makes toast.. I don't care what OS it is!". "Makes Toast?", I asked. "Yes.. Unlike for you, to me a computer is just a toaster. If it doesn't 'make toast'' (check email, surf the web, and play a few games) then I don't want it!.". "Oh! Okay.. let me see what I can do." So I set her up with a second laptop in the form of a new, Dell mini-9 with Ubuntu preinstalled and she loved it. It "Made Toast" and I had no more Antivirus subscriptions to deal with (and no more viruses or worries about the backdoor known as MS-Outlook).
She now checks email with Thunderbird and Squirrelmail, plays all her regular web-flash games... Plus, what really made her fall in love w/Linux were all the free/included versions of FreeCell/Blackjac and Mahjongg. Come to find out, FREE GAMES was the "big driver" for my wife's acceptance of the mythical "Linux Desktop".
Now I take that $50 every Christmas and buy her something from Victoria Secrets. A gift that keeps on giving ;)... instead of taking.