If you use a Windows 11 computer, Microsoft Defender Antivirus helps keep your PC safe from viruses and other threats. It does this by using special security updates called security intelligence. These updates help Defender find and block new threats.

Windows 11 usually updates these security files automatically, but you can also check for updates yourself anytime. This guide will show you easy steps to check and update Microsoft Defender on your PC.

Step-by-step: How to Check for Microsoft Defender Updates

1. Open the Windows Security app:
   
   
   Click the Start button (Windows icon on the bottom-left), type Windows Security, and press Enter.
   
   
   Or, you can click this link to learn more about the Windows Security app: Windows Security app guide.
   
2. Go to Virus & threat protection:
   
   
   In the Windows Security window, click on Virus & threat protection.
   
3. Open Protection updates:
   
   
   Scroll down a bit and click the Protection updates link.
   
4. Check for updates:
   
   
   You will see details about the current security update, including the version and last update date.
   
   
   Click the Check for updates button to look for the latest update and download it if available.
   

Visual Guide

Windows Security app – Virus & threat protection screen

Click the ‘Protection updates’ link

Click ‘Check for updates’ to get the latest security intelligence

Why Keep Microsoft Defender Updated?

• Microsoft Defender uses these updates to recognize and stop new viruses and threats.
• Keeping your security intelligence up-to-date helps protect your computer better.
• You can always manually check to make sure you have the latest protection.

That’s it! Now you know how to check and update your Microsoft Defender Antivirus on Windows 11 to keep your PC safe.