One nasty virus could expose your financial information or stop your computer from working at all. What you need is the best antivirus software possible on your computer. Luckily, some of the best are also completely free!
Many companies offer free versions of their popular antivirus programs for home users. My favorites are
AVG Anti-Virus Free,
avast! Free Antivirus, and
MSE, but be sure to check out the whole list to find the best free antivirus for you.
Important: I've included no "on-demand only" (without constant virus protection), trial, or shareware antivirus programs in this list. These are the best antivirus programs that are completely free and work similarly to, or better than, expensive programs from companies like Norton and McAfee.