Privacy and Security Find Microsoft Defender Antivirus Signature Version in Windows 11

This tutorial will show you how to find the current Microsoft Defender Antivirus security intelligence signature version in Windows 10 and Windows 11.

Microsoft Defender Antivirus is an antivirus software that is included in Windows 11 and can help protect your device from viruses, malware, and other threats.

Microsoft continually updates security intelligence in antimalware products to cover the latest threats and to constantly tweak detection logic, enhancing the ability of Microsoft Defender Antivirus and other Microsoft antimalware solutions to accurately identify threats. This security intelligence works directly with cloud-based protection to deliver fast and powerful AI-enhanced, next-generation protection.

To help ensure your antimalware solution detects the latest threats, they get updates automatically as part of Windows Update at least once a day.

Knowing your current Microsoft Defender Antivirus security intelligence signature version can help you make sure you have the latest version, a version a threat is identified by, or a version a false positive has been corrected by.

References:








1 Open Windows Security.

2 Click/tap on Virus & threat protection. (see screenshot below)


3 Under Virus & threat protection updates, click/tap on the Protection updates link. (see screenshot below)


4 You will now see the current Security intelligence version (ex: "1.443.1015.0") as the signature version. (see screenshot below)






1 Open Windows Terminal, and select either Windows PowerShell or Command Prompt.

2 Copy and paste the appropriate command below into Windows Terminal, and press Enter to see AntivirusSignatureLastUpdated and AntivirusSignatureVersion. (see screenshot below)








That's it,
Shawn Brink