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Windows Update is a Microsoft service for the Windows 9x and Windows NT families of the Microsoft Windows operating system, which automates downloading and installing Microsoft Windows software updates over the Internet.
Microsoft Security Essentials automatically checked and downloaded the latest virus definitions from Microsoft Update which was updated three times a day. [6] Users may alternatively download the updates manually from the Microsoft Security Portal website. [7]
Security updates are released once a month on the website, except in special circumstances; for instance, in the event of a widespread computer virus or worm, Microsoft releases a corresponding update as soon as possible. [1] Gordon Mangione, Microsoft's Security Business & Technology Unit vice president (from 2004-03 to 2005-11 [2]), remarked:
This update is no longer available from Microsoft Update Catalog or other release channels since September 12, 2023, although it continues to be available from Windows Update. 10.0.19044.1679 [35] KB5011831 Release Preview Channel: April 14, 2022 10.0.19044.1682 [36] Release Preview Channel and public release: April 25, 2022 10.0.19044.1706 [37 ...
The updates show up in Download Center before they are added to WU, and the KB articles are unlocked later. Daily updates consist of malware database refreshes for Microsoft Defender and Microsoft Security Essentials, these updates are not part of the normal Patch Tuesday release cycle.
The first preview was released to Insiders who opted in to the Canary and Dev Channels on February 8, 2024. The update began rolling out for Copilot Plus PCs on June 15, 2024. [5] As of build 26052, the version string has been changed from "23H2" to "24H2". The update began rolling out to all users on October 1, 2024. [6] [4]
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Microsoft's support lifecycle policy for the operating system notes that updates "are cumulative, with each update built upon all of the updates that preceded it", that "a device needs to install the latest update to remain supported", and that a device's ability to receive future updates will depend on hardware compatibility, driver ...