While Windows Defender Antivirus is automatically updated via Windows Update by default in Windows 10, you may want to check what version of Windows Defender Antivirus is currently installed.
This tutorial will show you how to find the version number for the currently installed Windows Defender Antivirus, scanning engine, and antivirus and spyware definitions (security intelligence) in Windows 10.
- Open Windows Security.
- Click/tap on Settings (gear icon) in the left pane of Windows Security, and click/tap on the About link in the right pane.
- You will now see the Antimalware Client Version (Windows Defender Antivirus), Engine Version (Scanning Engine), Antivirus Version (virus definitions), and Antispyware Version (spyware definitions).
- When finished, you can close Windows Security if you like.