As everyone is aware that support for Windows XP ends on 8 April 2014, so does Microsoft Security Essentials for Windows XP, the download link will be removed when the new version is released.
Microsoft has already announced that starting April, when Windows XP support is scheduled to come to an end, download links for Security Essentials with support for this particular OS version would be removed, in an attempt to convince users to move to a newer platform.
Definition updates will continue for a further 12 months.
“If you already have Microsoft Security Essentials installed, you will continue to receive antimalware signature updates for a limited time, but this does not mean that your PC will be secure because Microsoft will no longer be providing security updates to help protect your PC.”
So if there is anyone using MSE, I would advise that you download the installer and keep it a safe place, even those who download the MS Security release as when the new final version is released sometime in March 2014, Windows XP support will no longer be available...