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.

Microsoft SpyNet is a cloud service that allows the users of Microsoft Security Essentials (MSE) or Forefront Endpoint Protection (FEP) to send reports about suspicious software and programs to ...