As of April 8, 2014, support and updates for Windows XP are no longer available.
Microsoft provided support for Windows XP for the past 12 years. But the time came for Microsoft, along with their hardware and software partners, to invest resources toward supporting more recent technologies so that they can continue to deliver great new experiences. As a result, technical assistance for Windows XP is no longer available, including automatic updates that help protect your PC. Microsoft has also stopped providing Microsoft Security Essentials for download on Windows XP. If you already have Microsoft Security Essentials installed, you’ll continue to receive antimalware signature updates for a limited time. However, please note that Microsoft Security Essentials (or any other antivirus software) will have limited effectiveness on PCs that do not have the latest security updates. This means that PCs running Windows XP will not be secure and will still be at risk for infection.