Download the latest security intelligence updates for Microsoft Defender Antivirus, Microsoft Security Essentials (MSE), System Center Endpoint Protection (SCEP) and other antimalware.

Oct 29, 2025 · Microsoft Security Essentials is a free download from Microsoft that is simple to install, easy to use, and always kept up to date so you can be assured your PC is protected by the latest...

Jul 24, 2025 · Security Essentials has begun to mature, although it's still rough at the edges. Microsoft Security Essentials (MSE) is a free program that protects computers from viruses and spyware.

Microsoft Security Essentials (MSE) is a discontinued antivirus software (AV) product that provides protection against different types of malicious software, such as computer viruses, spyware, rootkits, …

Dec 27, 2025 · Keeping Microsoft Security Essentials up-to-date ensures that your computer is protected at all times and that the latest viruses and spyware variations will be detected during …

Dec 3, 2025 · Learn what Microsoft Security Essentials is, features, pros, cons, security benefits, risks, and modern alternatives for Windows protection.

Jan 3, 2026 · What Is Microsoft Security Essentials? Unveiling the Legacy Antivirus Microsoft Security Essentials was a free antivirus software from Microsoft that provided basic protection against …