Mac os x 10.6.8

I am dragging my feet to upgrade to Mountain Lion because Snow Leopard suits my needs just fine.  I am using Safari 5.1.7.  My subscription ended in January and I am so uncomfortable (coverage for Safari 5.1 is still lagging) because I always have had protection for my PC's and now my MAC.  Based on this, is there a Norton product that will give me protection.  I am a bit panicked right now as I foolishly clicked on an attachment which led me to believe a card was being sent to me and it took me to a website fx-enws.com talking about the benefits of raspberry drops.  Thanks in advance for your suggestions.  Dawson