Windows Defender Download Free for PC: Latest 64-bit Version Guide

1. Open the Start menu.
2. Search for Windows Security.
3. Open the Windows Security application.
4. Select Virus & threat protection.
5. Review the current protection status.
6. Check whether real-time protection is enabled.

If Microsoft Defender Antivirus is active, you can use Windows Security to start scans, review detected threats, and manage available protection settings.

You normally do not need to download a separate Defender Antivirus setup file.

How to Update Microsoft Defender

Microsoft Defender receives regular security intelligence updates to help it recognize new malware and other threats. Windows can automatically download and install many of these updates.

To review Defender's protection updates:

1. Open Windows Security.
2. Select Virus & threat protection.
3. Find the available protection update section.
4. Check the security intelligence update information.
5. Use the available update option if a newer update is available.

It is also important to keep Windows itself updated. Operating system updates can include important security improvements, bug fixes, and changes that support Microsoft's built-in security technologies.

Can You Install Another Antivirus With Microsoft Defender?

You should be careful when installing multiple antivirus programs on the same Windows PC.

Microsoft Defender Antivirus can change its operating mode when another compatible antivirus product is installed and providing active real-time protection. Depending on the security software and configuration, Defender may automatically switch off its real-time antivirus protection.

For most home users, running one primary real-time antivirus solution is generally preferable to installing several competing antivirus programs. Multiple security products can sometimes create conflicts, unnecessary system activity, or confusing protection alerts.