How to Enable Microsoft Defender Periodic Scanning in Windows 11

This guide explains how to manage periodic scanning with Microsoft Defender in Windows 11.

Windows 11 comes with Microsoft Defender, a strong security tool that protects your computer from viruses and malware. It works in the background to keep your files safe.

Why use this? If you use a different antivirus program, Microsoft Defender usually turns itself off to avoid conflicts. Enabling Periodic Scanning adds an extra layer of security by letting Defender run occasional checkups, even if it is not your main security app.

What happens when done? Your computer will run light, automated scans in the background to find threats your main antivirus might have missed.

How to Enable or Disable Periodic Scanning

Follow these steps to change your settings. Note: This process requires administrator privileges.

1. In the search box on your taskbar, type Windows Security and select Windows Security from the list.

2. Click on the Virus & threat protection tile.

3. On the next page, look for Microsoft Defender Antivirus options and click it to see more settings.
4. Toggle the Periodic scanning switch to On or Off.

Once turned on, Microsoft Defender will use the Automatic Maintenance feature to scan your PC at the best times so it does not slow down your work.

Summary

Microsoft Defender is a powerful tool built into your system. By turning on Periodic Scanning, you get a second opinion on your system’s health without needing to change your main antivirus software. It is a simple way to make your computer more secure against hidden threats.