The Online Family answers:

A computer that is connected to the Internet is a computer that is vulnerable -- even if it is turned on and you are not using it. And as cybercriminals continue to invent new tactics to gain access to your computer and its data, your best defense is a strategy with multiple layers, so that one security feature supports another. Be sure to have personal firewall, antivirus, and anti-spyware software installed and running. And supplement your security software with hardware protection such as DataBreaker, a device that automatically disables a broadband Internet connection to your PC or Mac while it is turned on, but not in use. This essentially creates a physical barrier that hackers can't get past. So, for your always-connected computer, take the necessary steps to minimize risks by combining security software and hardware solutions 24/7.