An anti-malware suite from Microsoft for Windows XP, Vista and 7. Introduced in September 2009, Microsoft Security Essentials (MSE) replaced Microsoft's antivirus subscription service (see Windows ...

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.

Similar to what Microsoft did for Windows 7, the extended security update program for Windows 10 will allow customers to purchase a yearly subscription to security updates for up to three years ...