In Windows 10, What Is Superfetch (SysMain)? Also, How to Disable It

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In many aspects, Windows 10 is a significant upgrade from its predecessors; nevertheless, when improperly set up, it may also feel sluggish and lethargic.

here is one less well-known option you should be aware of among the various methods to enhance Windows 10 performance: After the Windows 10 1809 upgrade, Superfetch is now known as SysMain.

This article will teach you everything you need to know about Superfetch (SysMain), including what it is, how it functions, why it could be problematic, and how to disable it if it’s a problem.

What Is Superfetch (SysMain)?

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Windows Vista introduced the function known as Superfetch. Although it is stated in the Superfetch service’s official description that it “maintains and enhances system performance over time,” this is an ambiguous and incomplete statement.

It discreetly monitors RAM consumption trends and learns what kinds of apps you frequently use as it runs in the background. As time passes, Superfetch categorizes certain applications as “often used” and preloads them into RAM.

In the Windows Task Manager, Superfetch is identified as “Service Host: SysMain.” The notion is that since the app is already preloaded in memory, you can run it much more quickly.

By default, Superfetch is made to load all of the preloaded programs into your RAM. It just affects unused memory, so don’t be concerned. Your system releases the required amount of memory when it no longer requires it (for example, when loading an app that wasn’t preloaded).

The preloading memory manager, Prefetch, was first introduced in Windows XP; it should be noted that Superfetch is not the same as Prefetch. Actually, Prefetch’s successor is Superfetch. What makes a difference? Prefetch didn’t track usage trends over time and modify its preloading settings accordingly.

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Is Superfetch (SysMain) Really Necessary?

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Superfetch is useful for the most part. Superfetch most likely functions so smoothly that you don’t even realize it if your computer is modern and has average or better specifications. Superfetch might even be active on your computer right now without your knowledge.

Superfetch (SysMain) can, however, cause the following “problems”:

  • Since Superfetch is constantly working in the background, it consumes some CPU and RAM on its own.
  • The necessity to load programs into RAM is still present even with superfetch. Instead, it moves the loading to an earlier period. Whenever that loading occurs, your computer still lags as if you hadn’t used Superfetch to launch the app.
  • Superfetch preloads a lot of data from your HDD to RAM, which might make the system start slow. Every time you start or restart your computer, Superfetch can be to blame if your HDD runs at 100% for a few minutes.
  • When Windows 10 is installed on an SSD, the Superfetch performance improvements might not even be evident. You don’t require preloading because SSDs are so fast. On Windows and other operating systems, there are numerous ways to assess the speed and functionality of your SDD.

On computers with 4GB of RAM or less, superfetch has also been reported to negatively affect gaming performance. We assume it has something to do with RAM-heavy games that continuously request and free up memory, which may cause Superfetch to load and unload data continuously. However, since this doesn’t happen to everyone, it’s unknown why it occurs.

Is it Safe to Disable Superfetch?

Yes! Choosing to turn it off has no negative implications. Keep your system working smoothly by leaving it on. But if your HDD or RAM consumption is high or your performance suffers when performing RAM-intensive tasks, consider turning it off and see if it helps. If it does, don’t turn it on. Alternatively, switch it back on.

How to Disable Superfetch (SysMain) on Windows 10

To clarify, we do not advise turning off Superfetch other than as a last resort to address the aforementioned potential problems. Because it improves overall performance, most users should have Superfetch enabled. Turn it off for a while if you’re unsure. Restart it if you experience no improvement.

Once more, Windows 10 refers to Superfetch as SysMain. Therefore, while disabling it, users should seek that.

1. Using the Services App

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The easiest approach to disable this feature is to use Windows Service to cease its service.

Search for services in the Start Menu, then open the Services app. As an alternative, open the Run window by hitting Windows key + R, type services.MSc, and then click OK.

Once you have located SysMain, right-click on it and select Stop. Superfetch is no longer active.

However, right-click SysMain in the Services app and choose Properties. Look under the General option under Startup type and set it to Disabled. (Or Manual, if you like to have the choice to activate it at a later time.)

2. Using the Registry Editor

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Although using the Services app is recommended, you can always directly edit the registry key if it doesn’t work for whatever reason. Back up the registry beforehand in case something goes wrong.

Note that before making any Registry changes, you must first create a System Restore point. If something goes wrong, you can go back to this restoration point.

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3. Using Command Prompt

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Using the Command Prompt is the quickest way to turn off Superfetch while still feeling like a Windows power user.

  1. Type cmd into the Start menu search bar, then select Command Prompt from the context menu and choose Run as administrator.
  2. Enter the following command into the console: sc stop “SysMain”.
  3. Enter the following command after doing so: sc config “SysMain” start=disabled.
  4. Switch off your computer and exit Command Prompt.

There are alternative methods to resolve the issues Sysmain might be causing on your system if removing the feature is not an option for you.

Utilizing troubleshooting tools like System File Checker (SFC) and Disk Cleanup tools to run system scans is the simplest way to accomplish this. In addition, you can do troubleshooting in a Clean Boot mode, which begins the system with the most fundamental collection of drivers and programs.

Consider upgrading your PC if the issue is brought on by a weak system configuration.

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