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How to Disable Superfetch (SysMain) in Windows 11 and Windows 10

Superfetch (also known as SysMain in Windows 11 and 10) is a built-in Windows service that preloads frequently used applications into RAM.

If you are experiencing system performance issues, you can disable this service. Let’s see how to do it. You can also read our guide: How to speed up Windows 10 computer? 10 Best Ways

What is SysMain (SuperFetch) responsible for?

The description of SysMain (SuperFetch) says that this service “maintains and improves system performance over time.” However, the mechanism of the service is not disclosed in detail.

SuperFetch is a feature that first appeared in Windows Vista. The service constantly runs in the background, analyzes RAM processing patterns, and learns which applications are used most often. Over time, SuperFetch marks these applications as “frequently used” and preloads them into RAM.

Thus, thanks to the work of SuperFetch, the application launch will be much faster because it has already been preloaded into RAM.

By default, SuperFetch fills the free area of ​​RAM with loaded applications. As soon as the operating system needs more RAM (for example, to load an application that was not preloaded), SuperFetch will release the required amount of RAM.

SuperFetch is the successor to the Prefetch service introduced in Windows XP. However, Prefetch did not parse usage patterns and set up prefetching accordingly.

Do you need SysMain (SuperFetch)?

In most cases, SuperFetch is beneficial. If you are the owner of a modern computer with at least average characteristics, the SuperFetch service will work fine and will not cause trouble.

However, SuperFetch can cause some problems:

Is it safe to disable SysMain (SuperFetch)?

Yes, it is safe for the system, but this action has a risk of side effects. If your system is working well, leaving the SuperFetch service enabled is recommended. If you are experiencing issues with high hard disk usage, high memory usage, or performance degradation during active RAM operations, try disabling SuperFetch and observe the system. If something goes wrong, you can always turn the service back on.

How does SuperFetch work?

The Superfetch service was first introduced in Windows Vista and is known as SysMain in the latest versions of Windows 10 and 11. The service runs in the background and analyzes PC usage scenarios.

Based on these scenarios, the service determines which applications are most likely to be used. These applications are then loaded into the computer’s RAM to speed up the launch of programs. In other words, the primary purpose of the service is to speed up the launch of frequently used applications.

Although the service is helpful in most cases, you can try disabling it if you experience performance problems with your computer. Disabling Superfetch will speed up the system a bit.

Disabling Superfetch in Windows 11 and Windows 10 is the same. The shutdown is available to you using the graphical interface and the command line.

Disabling Superfetch (SysMain) Using the GUI

To disable Superfetch, you can use the system application “Services.” Let’s take a closer look at how to do this.

To quickly find “SysMain,” select any entry in the list and start typing sysmain on your keyboard).

To re-enable Superfetch, click the Startup type drop-down menu and select Automatic.

Disabling Superfetch (SysMain) Using the Command Line

If you prefer to work with the console interface, you can disable Superfetch using the command line.

sc stop "SysMain" & sc config "SysMain" start=disabled

The Superfetch (SysMain) service is now disabled on your Windows machine.

To re-enable Superfetch, enter the following command:

sc config "SysMain" start=auto & sc start "SysMain"

Conclusion

I hope this guide on How to disable Superfetch (SysMain) in Windows 11 and Windows 10 was easy and helpful. If you face any issues, please comment down below.

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