What does it exactly mean that they are ending support for the platform? Well, the company will stop providing new antivirus definitions for the software. What that means, is that the software simply will not be updated after that date. If you continued to use Microsoft Security Essentials with Windows XP, you will be protected against viruses in the database prior to July 2015, but your computer will be susceptible to malicious software created after that date
What's the download link to this Last version of MSE?