Networks are everywhere; it’s not uncommon for people to have several computers and devices networked in thier homes. Large businesses have computer security departments to ensure security, how does a small business owner or home user protect themselves?
Virus infections are only one cyber threat, root kits, trojans, and many other types of tools are used to penetrate systems; is your cyber security comprehensive? Do you want to find out?
Do you know what to do if you discover that you have been hacked?
There are entire hacking toolkits that make system penetration as easy as it has ever been. Look at http://www.kali.org/ for an example of one of these tools; you will be shocked at how easy it can be to crack wireless and wired networks.