Microsoft Security Essentials Anti Virus

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.267.359.0
• Released: Apr 25, 2018 08:12 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.267.1524.0
• Released: May 17, 2018 03:55 PM UTC
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.269.1304.0
• Released: Jun 15, 2018 04:23 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.271.1074.0
• Released: Jul 16, 2018 08:06 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.273.1571.0
• Released: Aug 17, 2018 02:46 PM UTC
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.275.1312.0
• Released: Sep 16, 2018 10:33 AM UTC
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.277.1044.0
• Released: Oct 13, 2018 06:17 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.279.902.0
• Released: Oct 31, 2018 05:05 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Manually download and install the definitions
You can manually download the latest definitions or pre-release definitions.

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.281.1369.0
• Released: Dec 04, 2018 05:07 PM UTC
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/definitions

 

The latest antimalware definitions file is as follows:
Version: 1.283.3261.0
Released: Jan 18, 2019 11:43 PM UTC
Documentation: Release notes
https://www.microsoft.com/en-us/wdsi/definitions

 

Manually download and install the definitions
You can manually download the latest definitions or pre-release definitions.

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.287.142.0
• Released: Feb 16, 2019 08:45 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Latest definitions
The latest antimalware definitions file is as follows:

• Version: 1.291.79.0
• Released: Mar 22, 2019 03:36 PM UTC
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Manually download the update



You can manually download the latest update.

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.293.48.0
• Released: 4/23/2019 6:53:26 PM
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Latest security intelligence update



The latest security intelligence update is:

• Version: 1.295.12.0
• Released: 6/3/2019 9:08:21 PM
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Manually download the update



You can manually download the latest update.

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.297.506.0
• Released: 7/5/2019 10:56:57 PM
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/definitions

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.299.1250.0
• Released: 8/4/2019 5:23:57 PM
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/definitions

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.299.2914.0
• Released: 8/26/2019 7:37:01 PM
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/defenderupdates

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.303.487.0
• Released: 9/29/2019 10:06:55 PM
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/defenderupdates

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.305.1484.0
• Released: 11/5/2019 10:35:18 PM
• Documentation: Release notes

https://www.microsoft.com/en-us/wdsi/defenderupdates

 

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.307.517.0
• Released: 12/15/2019 3:00:56 PM
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/defenderupdates

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.307.2269.0
• Released: 1/13/2020 10:47:27 AM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.311.199.0
• Released: 2/27/2020 7:38:52 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.315.789.0
• Engine Version: 1.1.17000.7
• Platform Version: 4.18.2004.6
• Released: 5/16/2020 2:35:58 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.319.249.0
• Engine Version: 1.1.17200.2
• Platform Version: 4.18.2005.5
• Released: 6/26/2020 2:55:43 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.321.1099.0
• Engine Version: 1.1.17300.4
• Platform Version: 4.18.2007.8
• Released: 8/10/2020 3:53:47 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.323.210.0
• Engine Version: 1.1.17400.5
• Platform Version: 4.18.2007.8
• Released: 8/30/2020 9:05:16 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.323.2026.0
• Engine Version: 1.1.17400.5
• Platform Version: 4.18.2008.9
• Released: 9/27/2020 2:04:51 PM
• Documentation: Release notes

 

Security intelligence update version


Released on

10/31/2020 8:22:09 PM
Antimalware updates change log - Microsoft Security Intelligence

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.327.2102.0
• Engine Version: 1.1.17600.5
• Platform Version: 4.18.2011.6
• Released: 12/5/2020 8:35:38 AM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.329.347.0
• Engine Version: 1.1.17700.4
• Platform Version: 4.18.2011.6
• Released: 12/13/2020 7:17:46 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.331.821.0
• Engine Version: 1.1.17800.5
• Platform Version: 4.18.2101.9
• Released: 2/12/2021 11:03:02 AM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.333.1041.0
• Engine Version: 1.1.17900.7
• Platform Version: 4.18.2102.4
• Released: 3/22/2021 4:46:45 PM
• Documentation: Release notes

 

Security intelligence update version


Released on

4/19/2021 12:54:46 PM
https://www.microsoft.com/en-us/wdsi/definitions/antimalware-definition-release-notes

 

Security intelligence update version


Released on

5/19/2021 6:30:37 PM

https://www.microsoft.com/en-us/wdsi/definitions/antimalware-definition-release-notes

 

Security intelligence update version


Released on

6/14/2021 4:11:05 PM
https://www.microsoft.com/en-us/wdsi/definitions/antimalware-definition-release-notes

 

Security intelligence update version


Released on

7/7/2021 9:40:41 PM
https://www.microsoft.com/en-us/wdsi/definitions/antimalware-definition-release-notes

 

Security intelligence update version


Released on

8/5/2021 10:24:02 AM
https://www.microsoft.com/en-us/wdsi/definitions/antimalware-definition-release-notes

 

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.349.116.0
• Engine Version: 1.1.18500.10
• Platform Version: 4.18.2107.4
• Released: 9/4/2021 10:40:33 AM
• Latest security intelligence updates for Microsoft Defender Antivirus and other Microsoft antimalware - Microsoft Security Intelligence

 

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.349.1884.0
• Engine Version: 1.1.18500.10
• Platform Version: 4.18.2108.7
• Released: 10/3/2021 8:01:08 PM
• Documentation: Release notes
• https://www.microsoft.com/en-us/wdsi/defenderupdates

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.353.493.0
• Engine Version: 1.1.18700.4
• Platform Version: 4.18.2110.6
• Released: 11/5/2021 7:08:35 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.353.2133.0
• Engine Version: 1.1.18700.4
• Platform Version: 4.18.2110.6
• Released: 12/5/2021 6:29:44 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.355.1916.0
• Engine Version: 1.1.18800.4
• Platform Version: 4.18.2111.5
• Released: 1/14/2022 7:33:21 PM
• Documentation: Release notes

 

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.359.215.0
• Engine Version: 1.1.18900.3
• Platform Version: 4.18.2201.10
• Released: 2/14/2022 10:06:26 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.359.1955.0
• Engine Version: 1.1.18900.3
• Platform Version: 4.18.2202.4
• Released: 3/14/2022 4:15:24 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.363.442.0
• Engine Version: 1.1.19100.5
• Platform Version: 4.18.2203.5
• Released: 4/15/2022 8:24:22 PM
• Documentation: Release notes

 

Latest security intelligence update


The latest security intelligence update is:

• Version: 1.363.1679.0
• Engine Version: 1.1.19200.5
• Platform Version: 4.18.2203.5
• Released: 5/9/2022 6:24:38 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.369.34.0
• Engine Version: 1.1.19300.2
• Platform Version: 4.18.2203.5
• Released: 6/21/2022 6:42:33 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.371.562.0
• Engine Version: 1.1.19400.3
• Platform Version: 4.18.2205.7
• Released: 7/21/2022 2:40:22 PM
• Documentation: Release notes

 

Manually download the update


You can manually download the latest update.



Latest security intelligence update


The latest security intelligence update is:

• Version: 1.373.545.0
• Engine Version: 1.1.19500.2
• Platform Version: 4.18.2205.7
• Released: 8/17/2022 6:21:05 PM
• Documentation: Release notes

 

The latest security intelligence update is:

• Version: 1.375.196.0
• Engine Version: 1.1.19600.3
• Platform Version: 4.18.2207.7
• Released: 9/11/2022 3:25:03 PM
• Documentation: Release notes