Firewall software is essential for protecting your PC and home network from would-be intruders who know how to exploit security holes to break into your computer. Once a computer has been exploited by a hacker, your personal and financial data could be compromised. Furthermore, your PC could be turned into a drone that sends SPAM round the clock unbeknownst to you. Don't be a victim! Firewall and anti-virus software are absolute necessities for any computer that connects to the Internet.