All Free Antivirus

I would like to know which anti-virus software I should get. So if someone could post a link to the best free and best for a price I would appreciate it. I would also like find out the same information about anti-spyware and other software that will help keep my computer clean and free of anything I wouldn’t want on it. I only know a little about computers so if there’s another kind of software please let me know.

pc security