When browsing hundreds and thousands of websites on the Internet, one cannot be sure not to catch a cyber cold somewhere out there. A computer virus is very similar to the one people have: if you let it be, it will grow and become stronger, while you will get weaker and weaker. The same goes for computer viruses: if you don't protect your computer, you can get a virus, if you don't treat the virus, your might lose your computer, along with your sensitive data.
Some people say they use such an operating system that cannot catch any cold, some say that they use good firewall software, some don't even believe in computer viruses. Which one is you? Do you believe special software can protect you against malicious software? Do you use antivirus software?