How to protect your computer against viruses

Well, you just reinstall system and your fight against viruses, trojan horses, malware and other annoying stuff begin. You may ask why is important to protect your computer? And how can I do that? Is it difficult?
Why I have to protect?
Maybe you never have problem with your PC. Everything works fine. You never have virus. But it’s not true. The computer experts says, that every computer get some virus, malware or trojan virus within 8 minutes after you connect to the internet. But you haven’t chance to recognize this. Computer viruses are very quiet. Their just go to your PC and waiting. Sometimes sending your personal information to their owner, sometimes just waiting to command “destroy it“.
How I can protect my PC?
Basic protection of your PC is very easy. You just need some good firewall and antivirus program. Firewall is something like big wall between your computer and internet. When you connect to same internet page, this program checks every data going to you. When it recognize some bad software it says “stop, you can’t go here” and give message “some virus just wanted go to you, but I stop it“. Antivirus program is software, which checking every data in your HDD (harddisk) and also external disk (CDs, DVDs, flash disks). It can also cooperate with your firewall.
Now?
YES! You have to do it now. Remember, 8 minutes limit. If you don’t do that, your computer will be because of malware etc. slower and you can sleep in night within checking your computer if it isn’t blow up. I’m not kidding, there are really viruses which can for example overheat processor.