Sysmain: What is Sysmain SuperFetch? Ways To Disable It?
In this article, you will learn about Sysmain. The Superfetch is also having a Windows system process that also has had some of the multiple names that will throughout the years. Having Windows XP it was also known as Prefetch. A Superfetch was also introduced in Windows Vista and on the latest versions of Windows 10. Also, it is now known as Sysmain.
So, ultimately, the purpose of every generation of Superfetch has been the same. You have to increase the performance of Windows. Just by preloading apps so that you can frequently use them into RAM. This will before you will also need to use them. Also, what is Superfetch?
Ways That Does Superfetch (Sysmain) Work?
Using the latest versions of Windows 10, the Superfetch service also now shows up. This will also get under the name SysMain. Using the Task Manager, it will also show you up as Service Host: SysMain.
In case, if you are running an older version of Windows 10 or any version of Windows 7 or 8. So, this will also show up in the Task Manager as Service Host: Superfetch.
This service runs in the background (using very little CPU power) and analyzes how much RAM you’re using and what apps you run most frequently. Any apps the service recognizes as “frequently used”, it’ll start preloading the app into RAM. This way, the next time you run the app, it’ll launch much more quickly.
You may be concerned that this means Superfetch is using up all of your RAM, but it isn’t. The service focuses on pre-loading apps into unused RAM. This doesn’t register as consumed memory. You’ll see this if you open Task Manager to the Processes tab and look at your Memory usage.
Even though Superfetch is consuming all unused RAM with preloaded apps, consumed RAM usage still doesn’t show 100%. This is because Superfetch is running in the background, and it’ll release any unused RAM it’s using whenever you need to use that memory for other active tasks.
Should You Kill Superfetch (Sysmain)?
Generally, there’s no need to stop Superfetch from running. It uses a very minuscule amount of CPU, and only uses unused RAM. All of this is unnoticeable to the general user.
However, there have been some reports throughout Microsoft user forums that sometimes the Superfetch (Sysmain) process actually causes performance issues. Some of these reported issues include:
- Constant 100% disk utilization.
- Overheating leading to system shutdown.
- Slow bootup time when you start your computer.
- On weak hardware, Superfetch could use more CPU and RAM than you might like.
- Has been known to cause performance issues while gaming.
The most common problem people report is the 100% disk utilization issue. If this is you, then disabling Superfetch or Sysmain may resolve the problem.
Since Superfetch is only a system optimization feature, you won’t hurt Windows by stopping the service. However, you may notice that launching your favorite apps may take a little longer than usual.
How To Disable Superfetch (Sysmain) In Windows 10
Is it safe to disable Superfetch?
If you aren’t experiencing performance issues or other problems, it’s a good idea to leave Superfetch (Sysmain) running. It is a useful process that significantly cuts down on the time it takes you to launch programs that you use frequently.
However, if you are experiencing high hard drive utilization, constant memory issues, or overall poor performance, you can try disabling Superfetch to see if it resolves the problem. If it does, then leave the service-disabled. Otherwise, turn it back on and continue troubleshooting.
To disable Superfetch (Sysmain) on Windows 10:
- Select the Start menu, type services, and select the Services app. You could also press Windows + R, type services.MSC and press Enter.
- In the Services app, scroll down to SysMain, right-click on the service, and select Stop. If you’re running an older version of Windows, right-click on the SuperFetch service and select Stop.
- Now you need to prevent the service from restarting when you start Windows. Once the service is stopped, right-click on the service again and select Properties.
- In the Startup type dropdown, select Disabled.
Now the SuperFetch (SysMain) service is permanently disabled and will not restart the next time you start your computer.
Disable Superfetch With Registry Editor
An alternative to using Task Manager to disable Superfetch on Windows 10 is using the Registry Editor.
Before you start doing anything inside the registry, make sure you take a full backup of the registry first, just in case anything goes wrong.
When you’re ready:
- Select the Start menu, type Regedit, and select the Registry Editor app.
- In the Registry Editor, navigate to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > Session Manager > MemoryManagement > PrefetchParameters.
- In this section, you should see a key called EnableSuperfetch. Right-click this key and select Modify.
- In the Edit DWORD window that pops up, change the Value data field to 0 and select OK.
You can close the Registry Editor when you’re finished.
This registry entry will disable the SuperFetch (SysMain) service on your system. However, you may need to restart your Windows machine before this registry setting takes effect.
Enable Or Disable SuperFetch With Command Prompt
In case, if you prefer working with the command prompt. Then there are some simple commands you can use to enable or disable the SuperFetch service.
Open the command prompt in administrator mode first, and then use the following commands:
- To Enable: sc config “SysMain” start=auto & sc start “SysMain”
- Disable: sc stop “SysMain” & sc config “SysMain” start=disabled
Note: If you’re using an older version of Windows, replace “SysMain” with “SuperFetch” in the commands above.
If you prefer PowerShell, open it with administrator rights and use the following commands:
- Enable: Set-Service -Name “SysMain” -StartupType Automatic -Status Running
- Disable: Stop-Service -Force -Name “SysMain”; Set-Service -Name “SysMain” -StartupType
This approach can be much faster and simpler than clicking around in the Task Manager or the Windows registry.
What If This Doesn’t Fix The Problem?
In case, if you are disabling the SuperFetch (SysMain) that does not help you to resolve your issue. Now, there is something else that may be the source of the problem.
Also, If you are still having 100% disk utilization. Then you may also need to upgrade to a larger hard drive. Also, you can opt for your upgrade to an SSD drive. Now, SSD drives are very affordable and have data-transfer rates far above that of traditional hard drives. Also, if you are having CPU utilization issues. So, you can also explore few other CPU troubleshooting tips. Then to nail down the culprit that’s chewing up all of your CPU resources.
The Superfetch is also having a Windows system process that also has had some of the multiple names that will throughout the years. Having Windows XP it was also known as Prefetch. A Superfetch will also introduce this in Windows Vista and on the latest versions of Windows 10. Also, it is now known as Sysmain.
So, ultimately, the purpose of every generation of Superfetch has been the same. You have to increase the performance of Windows. Just by preloading apps so that you can frequently use them into RAM.