Smart Fortress 2012 is malware that attempts to gain some information like your credit card from you by telling you to buy their product (or register) to remove the "infected files"
this link seems like it can help http://forums.malwarebytes.org/index.php?showtopic=107384
I believe it is free. If this helps and removes your problems I would suggest downloading a program called Spybot Search and Destroy
which is a really great program for removing malware.
used to be a fairly good anti-virus that you could get a free version of, I would suggest using that until you find something better.
Lastly, I would most strongly suggest taking your computer to a professional who has experience doing these types of things instead of taking the suggestions from an internet forum.
Thank you and have a good night from your friend Steve (Achmed) from Ohio (Kuwait)
Also, sometimes Google can be your friend. Don't be afraid to ask questions, Google might have some answers, just make sure you follow up with some professional advise before doing anything you read on the web.