If you often think about disabling Windows Defender simply because it slows you system down too much, this is a far better alternative.Īs for why you should limit CPU usage for Windows Defender, the app tends to drag everything down. It won’t impact how well Windows Defender can protect your system and it certainly won’t turn off the scans it runs when you download new files to your system. This may have an impact on how much time it takes to run a full scan on your system.
The throttling applies to when Windows Defender runs a full scan and will be applied when it tends to start running if your system is idle. All that does is disable throttling which means Windows Defender will use as much of your CPU as it wants. You can increase the limit beyond 50% if you like but you cannot reduce it to 0. Set-MpPreference -ScanAvgCPULoadFactor 50 Run the following command but replace the number at the end with how much CPU usage you want to allocate to Windows Defender. Decide how much CPU you want Windows Defender to be able to use. By default, Windows Defender can use up to 50% of the CPU. The CPU usage is set as a percentage of your CPU’s total processing power. It only requires a little command to be run in PowerShell however, you will need admin rights to run it. Microsoft has a documented method that lets you limit Windows Defender CPU usage.
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