Free Anti-virus Software
Every computer needs anti-virus software. Protecting your computer will help protect your kids on the internet, and protect you from identity theft and viruses. But not all anti-virus software works like it should. Below is the highest ranked antivirus software by AV-Test and PC Magazine, and it's free.
Bitdefender Antivirus Free Edition
Download for Windows: http://www.bitdefender.com/solutions/free.html
Downlaod for Mac: http://www.bitdefender.com/solutions/virus-scanner-for-mac.html