No New Patches
Once it ends support on April 8, Microsoft theoretically will not be issuing any patches for the operating system, leaving the potential for open vulnerabilities. The only time an exception might be made is if a quickly spreading attack had the potential to cause serious problems, say security experts.
Officially, don't count on any new security updates. New security updates, nonsecurity hotfixes, free or paid assisted support options, or online technical content updates will come to an end, said Tim Rains, director of product management in Microsoft's Trustworthy Computing group. "Since a security update will never become available for Windows XP to address these vulnerabilities, Windows XP essentially will have a "zero day" vulnerability forever," Rains said.