Microsoft ended its support for Windows XP officially more than a month ago on April 8, 2014. A relatively simple trick has emerged as a trick for XP users which makes it possible to receive Windows XP security updates for the next five years i.e. until April 2019. It makes use of updates for Windows Embedded POSReady 2009 based on Windows XP Service Pack 3, because the updates are inevitably the same updates Microsoft would have rolled out for its Windows XP, if it was still supporting XP Operating System.
Source: https://thehackernews.com/2014/05/registry-hack-get-windows-xp-security.html