https://en.wikipedia.org/wiki/Microsoft_Security_Essentials
Andra paragrafen,
Built upon the same virus definitions and scanning engine as other Microsoft antivirus products, MSE provides real-time protection, constantly monitoring activities on the computer and scanning new files as they are downloaded or created and disabling detected threats. It lacks the personal firewall of OneCare or the centralized management features of Forefront Endpoint Protection.
Andra paragrafen under rubriken features,
MSE is built upon the same foundation as other Microsoft security products; all use the same virus definitions and anti-malware engine, known as Microsoft Malware Protection Engine (MSMPENG). It lacks the personal firewall of OneCare or the centralized management features of Forefront Endpoint Protection.
https://en.wikipedia.org/wiki/Windows_Defender
Två sista raderna under rubriken Basic features,
In Windows 8, functionality has increased to offer antivirus protection as well. Windows Defender in Windows 8 resembles Microsoft Security Essentials and uses the same virus definitions.
Från rubriken Conversion to antivirus,
Windows Defender was released with Windows Vista and Windows 7, serving as their built-in antispyware component. Windows Defender is superseded by Microsoft Security Essentials, an antimalware product from Microsoft which provides protection against a wider range of malware. Upon installation, Microsoft Security Essentials disables Windows Defender and takes over its duty. In Windows 8, Microsoft upgraded Windows Defender into an antivirus program comparable to Microsoft Security Essentials. This new Windows Defender greatly resembles Microsoft Security Essentials and uses the same virus definition updates. As a result, Microsoft Security Essentials is not compatible with Windows 8.