Personal security for the computer in you home is as important as the one in your office. Since your home computer is laden with crucial information about you including band details and social security numbers, hackers are sure to make a go at stealing your data. personal security devices for your computer work at the software level. There are three major personal security devices for your computer. Firewall is used to prevent hackers from accessing your computer. Then there are antivirus solutions which protect your computer from viruses. Finally there are anti spyware tools which protect your computer from spyware, adware and rootkits.