There are a few AntiVirus programs that you can find online for no cost. These programs take zero money out of your pocket and they will still protect your computer against viruses. My recommended picks are below. Both of these products offer daily virus definition updates and “on-access” real-time virus scanning. The best part is, they’re 100% free!
GriSoft AVG AntiVirus FREE edition:
Avira AntiVir PersonalEdition Classic:
Make sure to completely uninstall Norton or McAfee products, preferably before you install AVG or Avira AntiVir. Running two different AntiVirus programs simultaneously can cause conflicts on your computer.
Schedule a weekly full system virus scan at a time when you will not normally be using your computer. Example: 3AM on a Sunday.
Regularly backup important files. There is no AntiVirus product that is 100% effective. To protect against data corruption or loss, make a backup of critical files on a routine basis.