Free Antivirus Altenative

We have discussed the free anti-virus alternative instead of paying expensive Norton subscription.

My answer is to use the free anti-virus, and my favorite anti-virus are:
AVG, and MalWareBytes. Both are excellent security products, The AVG came with a suite of different defensive weapons, such as the (IE and Firefox) browser safe search plug-in. The safe search screen all search results, and warn you on those pages that may contain any potential harmful script.

You may also try Avira or Avast . Both are decent and light weight cause less of a performance hit.

All anti-virus software can not keep the virus, worms, and Trojans completely away. Surf responsively, and make sure your Windows are up to date at all time, especially those security updates. Keep your Windows Security Center armed at all time, i.e. turn Control Panel -> Firewall, Automatic Updates, Virus Protection, all On.