Windows 11 Disable Super Fetch and Cortana to fix High CPU Load Issue


Superfetch (Sysmain) is a service that allows apps on Windows to load content even before you open them. However, depending on the number of apps you use and your PC’s configuration, the CPU usage can also bump significantly. To fix this, you can disable the Superfetch service for some time. Here’s how.

Step 1: Press the Windows key + R to launch the Run command. Type in services.msc in the box and press Enter.

Step 2: Locate the SysMain service on the list and double-click on it to open its properties.

Step 3: Change the Startup type to Disabled and hit Apply followed by OK.

Restart your computer to apply the changes and monitor if it still shows high CPU usage in the Task Manager.


Many users have also reduced CPU usage after disabling Cortana on Windows. Although Microsoft’s digital assistant is much less intrusive on Windows 11, it might hog system resources at times.

Step 1: Press the Windows key + I to open the Settings app. In the Apps tab, click on Installed apps.

Step 2: Scroll down to locate Cortana, click on the three-dot menu next to it, and select Advanced options.

Step 3: Lastly, toggle off the Cortana option under the  ‘Runs at log-in’ section.

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