Uploaded October 2025 | Updated September 2026, 1 week ago

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Microsoft Defender quietly runs several background tasks, including daily quick scans and real-time checks of every file you or an app opens, and those processes can affect PC performance. If you find that your Microsoft Defender is always using high CPU resources, try the methods in the video to make it requiring fewer system resources on your system.







What you'll learn:
1. Control CPU Resources for Microsoft Defender Scans
a. How To ensure your foreground apps get the most CPU resources when the scan runs
b. How you can decrease the scan’s priority and resource usage limit using PowerShell commands
c. How to run Windows Powershell as Administrator
d. How to set Microsoft Defender priority to low
e. How to set the CPU usage limit to 30%
f. How to reset the changes
2. Manage Archive Scanning
a. How you can configure Defender to only scan archives that are bigger than a specific size
b. How to disable scanning of archives
c. How to limit the scan to under 1 GB archives
3. Manage Scan Time
a. How To minimize Microsoft Defender scans
b. How you can select a more appropriate time and frequency for Microsoft Defender scans
c. How to open the Task Scheduler
d. How to set scan time, frequency, and the day of the week that best suits your needs
e. How to scan on a weekly basis at your set time






























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