Hi sweet142, what i would suggest you is AVG or AVAST, like what other users told you. If you're going to download AVG is better if you install the 7.5 version because the latest version, the 8.0 edition is having some problems in updating, and some users are finding the 7.5 much better at the moment. They are both good and free. Google them out and you'll find their links to download them.
Enjoy
Btw GhostXx you're right about this topic, it's becoming an old man now!! lol