Update antivirus

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Small Business. About us. About company. Please rate your experience Yes No. Any additional feedback? Tip To see the most current engine, platform, and signature date, visit the Security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware.

Note Monthly updates are released in phases, resulting in multiple packages visible in your Window Server Update Services. This article lists changes that are included in the broad release channel. See the latest broad channel release here. To learn more about the gradual rollout process, and to see more information about the next release, see Manage the gradual rollout process for Microsoft Defender updates.

To learn more about security intelligence updates, see Security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware. If you're looking for a list of Microsoft Defender processes, download the mde-urls workbook , and then select the Microsoft Defender Processes worksheet. The mde-urls workbook also lists the services and their associated URLs that your network must be able to connect to, as described in Enable access to Microsoft Defender for Endpoint service URLs in the proxy server.

Important This update is: needed by RS1 devices running lower version of the platform to support SHA2; has a reboot flag for systems that have hanging issues; is re-released in April and will not be superseded by newer updates to keep future availability; is categorized as an update due to the reboot requirement; and is only be offered with Windows Update.

Note If you are manually deploying Microsoft Defender Antivirus Platform Update, or if you are using a script or a non-Microsoft management product to deploy Microsoft Defender Antivirus Platform Update, make sure that version 4.

Submit and view feedback for This product This page. View all page feedback. In this article. Microsoft Defender update for Windows operating system installation images. Manage how protection updates are downloaded and applied. Manage when protection updates should be downloaded and applied. Manage updates for endpoints that are out of date. If an endpoint misses an update or scheduled scan, you can force an update or scan the next time a user signs in.