Microsoft Security Essentials Update Alternatives

Free program that protects your computer against pop-ups, slow performance and security threats.

Keep your Norton Anti-Virus updated.

Download the latest updates or definitions for your Microsoft Windows Defender security software

Keep your Malwarebytes Anti-Malware updated, even if offline.

Windows Essentials is a suite of freeware applications by Microsoft that aims to offer integrated and bundled e-mail, instant messaging, photo-sharing, blog publishing, and security services.