Layers of protection

You have to view your computer like any important real asset, and protect it with layers of protection. This list is far from comprehensive, but it's a start. I welcome input and comments:

• Virus protection. While there is a thread of discontent on the Web, claiming that the virus protection software companies are part of the problem as well as part of the solution, there's no question that you have to have virus protection. We'll explore this in greater detail in later posts.
• Firewall. With the free version of Zone Alarm as effective as it is, there is no excuse for not having a firewall. Yes, it requires some learning and attention; but it's worth it.
• Reliable, regular backup. No excuses. I use an external USB drive and an amazing piece of software called MirrorFolders (Google it; I'm not sellling you anything here.)
  
• Periodic scans with software you don't regularly use, just to get a different slant on your state of "cleanliness."
• Hardware. If you use a router, especially wireless, turn on password protection.