Microsoft officially ended support for Windows XP on April 8, 2014. That means the company is no longer patching newly discovered security vulnerabilities in the operating system, and people who continue to use it are opening themselves up to security risks. However, according to NetMarketShare, more than a quarter of all PCs (27.69 percent) were still running Windows XP in March of this year.Why would people continue using a twelve-year-old operating system that would put them at risk?No doubt, many are home users who simply aren't very technology savvy and/or may not have the desire or the money to upgrade...