Microsoft Security Essentials, which until now was known by its code name Morro, is Microsoft's second stab at a comprehensive antivirus, antimalware product. The new free Microsoft Security ...

The free Microsoft Security Essentials download, also known as MSE, provides real-time protection for PCs that guard against an array of threats including viruses, spyware and other malicious ...

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Introduced in September 2009, Microsoft Security Essentials (MSE) replaced Microsoft's antivirus subscription service (see Windows Live OneCare) and its Defender antispyware software (see ...

Microsoft Security Essentials 4.0 does a decent job protecting a clean PC, but in testing its cleanup of already-infested systems wasn't thorough. You can get better protection for the same price.