How to prevent viruses without using the "Anti-Virus" softwares?

Can we don't buy the "Anti-Virus" software products and destroy the viruses without these softwares?

How to prevent viruses without using the "Anti-Virus" softwares?norton internet security

here is a list of things you Don't have to buy

How to prevent viruses without using the "Anti-Virus" softwares?spyware remove

There are free antivirus programs that are available, otherwise try prayer and hope for the best.
You don't need to pay.

AVG is free!

http://free.grisoft.com/
Leave your machine unconnected to a public network and only intsall software from trusted sources (IE original discs from known manufacturers.) and you probably don't need one.

I don't use a memory resident scanner on my own machine, I find they slow down the machine too much. What I do is have a weekly scan, I keep my data on a separate physical drive, and each week after my scan if it's clean I make an image of my boot/application drive. If I ever catch anything, I just roll back and reinstall anything I installed in the past week.
Impossible. Unless you have superpowers.

If you don't want to have viruses,

- Don't connect to the internet. Otherwise, surf safely.