Update: This deal is over. Now sold out. Buy.com takes $41 off the price of McAfee Internet Security 2011, dropping it to $8.99 with free shipping. This is the best price we could find by $12. It protects your computer from viruses and other internet threats. It features 2-way firewall to block hackers, improved parental controls, and was redesigned to be easier to use. It works with Windows XP or higher. Sales tax is only charged in CA, MA, MD, NY, and TN.