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Microsoft Defender Antivirus (formerly Windows Defender) is an antivirus software component of Microsoft Windows. It was first released as a downloadable free anti-spyware program for Windows XP and was shipped with Windows Vista and Windows 7 .
The service delivers software updates for Windows, as well as the various Microsoft antivirus products, including Windows Defender and Microsoft Security Essentials. Since its inception, Microsoft has introduced two extensions of the service: Microsoft Update and Windows Update for Business.
Users may alternatively download the updates manually from the Microsoft Security Portal website. [7] On 30 September 2011, a faulty definition update caused the product to incorrectly tag Google Chrome as malware. The issue was resolved within three hours.
This new component is a Universal Windows Platform app and is also the default front-end for Windows Defender. [12] [13] It relies on its own service, called "Windows Defender Security Center Service". In comparison to Security and Maintenance, the WDSC: monitors antivirus and firewall software, device drivers, device security, storage capacity ...
As far as the integrated Windows Update (WU) function is concerned, Patch Tuesday begins at 10:00 a.m. Pacific Time. [9] Vulnerability information is immediately available in the Security Update Guide. The updates show up in Download Center before they are added to WU, and the KB articles are unlocked later.