How to Check Your Microsoft Defender Antivirus Signature Version in Windows 11
The Microsoft Defender Antivirus signature version is a small data file that teaches Windows 11 to spot and block new viruses, malware, and ransomware. Checking this version number lets you confirm your PC security intelligence is current and ready to stop the latest threats.
Windows 11 includes this built-in protection on every PC running security updates. Finding the exact signature version takes just a few clicks through the Windows Security app or PowerShell.
⚡ Quick Answer
Open Windows Security, navigate to Virus & threat protection, and then click Protection updates. Your current Security intelligence version is displayed there. Alternatively, use the command Get-MpComputerStatus | select AntivirusSignatureVersion in Windows Terminal.
Method 1Check Signature Version in Windows Security
Click the Start button and type Windows Security, then open the app.
In Windows Security, click on Virus & threat protection.
Look for the section called Virus & threat protection updates, then click Protection updates.
You will see your current Security intelligence version (this is the signature version).
Look for Security intelligence version, which is the actual signature version. Alternatively, open Windows Security, navigate to Virus & threat protection, click Virus & threat protection updates, and locate Security intelligence version there.
Windows Security Virus and threat protectionProtection updates virusProtection updates virus details
Method 2Check Signature Version Using Command Prompt or PowerShell
Right-click the Start button and choose Windows Terminal (or open Command Prompt or PowerShell).
Copy and paste the command below, then press Enter:
Using the Command Prompt or PowerShell makes checking your Microsoft Defender signature version a quick process. Open Windows Terminal as an administrator. Run `Get-MpComputerStatus | Select-Object AntivirusSignatureVersion` to see your current signature version.
📝Good to Know
Microsoft Defender Antivirus signature version displays the date the antivirus last updated and the specific signature version number, which helps verify the antivirus has the latest protection against new threats.
Protection updates virus terminal details
Why This Matters
Automatic Updates: Defender updates itself automatically, but it’s good to check the version sometimes.
Security: The signature version tells you how current your protection is.
Easy to Check: Use the Windows Security app or a quick command—both work well!
Stay Safe: Knowing your signature version helps you be sure your PC is protected.
Checking this version confirms your PC has the latest protection against new threats. While Defender updates automatically, checking the version ensures your security intelligence is current, helping maintain online safety.
That covers the process for checking your Microsoft Defender Antivirus signature version on Windows 11.
Is Windows Defender signature based?
Endpoint Security Windows Defender is a signature-based antimalware system. These signatures provide the definitions Windows Defender uses to identify malware on a Windows system.
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Richard, a writer for Geek Rewind, is a tech enthusiast who loves breaking down complex IT topics into simple, easy-to-understand ideas. With years of hands-on experience in system administration and enterprise IT operations, he’s developed a knack for offering practical tips and solutions.
Richard aims to make technology more accessible and actionable. He's deeply committed to the Geek Rewind community, always ready to answer questions and engage in discussions.
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