Microsoft Defender Antivirus uses cloud-delivered protection also called the Microsoft Advanced Protection Service or MAPS and periodically downloads security intelligence updates to provide protection. Cloud-delivered protection is always on and requires an active connection to the Internet to function. Security intelligence updates occur on a scheduled cadence configurable via policy. For a list of recent security intelligence updates, see Security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware.
Engine updates are included with security intelligence updates and are released on a monthly cadence. Microsoft Defender Antivirus requires monthly updates KB known as platform updates. For more information, see Manage the sources for Microsoft Defender Antivirus protection updates. For information how to update or install the platform update, see Update for Windows Defender antimalware platform. Security intelligence update version: 1.
After a new package version is released, support for the previous two versions is reduced to technical support only. Versions older than that are listed in this section, and are provided for technical upgrade support only. Affected machines appear to the customer as having not updated to the latest antimalware platform.
When this update is installed, the device needs the jump package 4. Platform and engine updates are provided on a monthly cadence. To be fully supported, keep current with the latest platform updates. Our support structure is dynamic, evolving into two phases depending on the availability of the latest platform version:. Security and Critical Updates servicing phase - When running the latest platform version, you will be eligible to receive both Security and Critical updates to the anti-malware platform.
Technical Support Only phase - After a new platform version is released, support for older versions N-2 will reduce to technical support only. Platform versions older than N-2 will no longer be supported. 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. Automatic updates. To help ensure your antimalware solution detects the latest threats, get updates automatically as part of Windows Update.
If you are having problems with Windows Update, use the troubleshooter. If you don't already use Microsoft Defender Antivirus, learn how to turn it on. Trigger an update. A manually triggered update immediately downloads and applies the latest security intelligence. This process might also address problems with automatic updates. Microsoft Defender Antivirus and other Microsoft antimalware solutions provide a way to manually trigger an update.
Enterprise administrators can also push updates to devices in their network. To clear the current cache and trigger an update, use a batch script that runs the following commands as an administrator:. The majority of new antivirus programs programs or computers purchased after the year enable users to update their antivirus program through the software.
Open the antivirus program and look for "Update," "Check for updates," "Live Update," or something similar. Below are examples of how a user may update their antivirus program.
If you do not have an antivirus program installed on your computer, we strongly recommend purchasing one at your local electronics store or downloading one from the Internet. Links to popular antivirus programs are listed further down this same page.
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