Back in April of this year(2013), it was announced that after April 8 of 2014, Microsoft Windows XP Service Pack 3 (SP3) customers will no longer receive new security updates, non-security hotfixes, free or paid assisted support options or online technical content updates. This means that any new vulnerabilities discovered in Windows XP after its “end of life” will not be addressed by new security updates from Microsoft.
As for the security mitigations that Windows XP Service Pack 3 has, they were state of the art when they were developed many years ago. But we can see from data published in the Microsoft Security Intelligence Report that the security mitigations built into Windows XP are no longer sufficient to blunt many of the modern day attacks we currently see. The data we have on malware infection rates for Windows operating systems indicates that the infection rate for Windows XP is significantly higher than those for modern day operating systems like Windows 7 and Windows 8.
You can imagine that businesses from small to large, will be planning to migrate from Windows XP as soon as possible. For individuals and small companies, Windows XP has a utility, Files and Settings Transfer Wizard, to copy user data and settings from one computer to another.