Windows XP will officially retire on April 8, 2014. Like all technologies that come to their end-of-life, the XP operating system and most of its desktop applications will no longer receive updates and security patches. Since unpatched browser bugs are often used by malware to infect computers, Google is extending support for Chrome on Windows XP, and will continue to provide regular updates and security patches until at least April 2015.
Millions of users still rely on Windows XP. Moreover, many organizations still run dozens or even hundreds of applications on XP and may have trouble migrating. Google's goal is to support Chrome for XP users during this transition process. Most importantly, Chrome on XP will still be automatically updated with the latest security fixes to protect against malware and phishing attacks.