if you are looking for What is service host sysmain ? How to solve service host sysmain high cpu problem? then you are in right place. this is the most common reason when you upgrade your windows.
If your games are lagging, computer responding very slow, showing high disk / CPU usage then it might be because of the difficulty with the Sysmain or SuperFetch service. I noticed it when my laptop become unresponsive and after investigating I found that sysmain is taking over the high resources. Sometimes it resolved automatically but any point it again become unresponsive. So I researched and determine the facts about this service. See how you’ll disable this service or fix this issue.
- To confirm the new settings, click Apply. From now on, the SysMain service will be disabled and will not restart. After disabling SysMain in Windows 10, you should no longer have problems with it related to 100% disk or CPU usage.
- If you see a process called Service Host: Local System is using up all of your computer or laptop resources in Task Manager in Windows 10, 8 or 7, it's time to read this post from the beginning to the end and pick up a solution to stop Service Host: Local System from taking high disk usage, CPU usage, memory usage or too much network bandwidth.
- Service Host SysMain (earlier known as Superfetch) is a bundle of system process that includes multiple processes. In this article, we explore a few troubleshooting steps to help you resolve the service Host SysMain causing a high disk usage issue in Windows 10.
Screenshot of supfetch service consuming most disc space and high memory & CPU usage
This service can also create the 100% disk issue. So disabling or fixing the difficulty related the SuperFetch can also fix the 100% disk usage issue also . Before going further first lets realize the Sysmain service in Windows 10.
If you don’t see a decrease in the usage, then get on to the next fix. Fix 2: Disable the Superfetch service. Superfetch service, commonly referred as Sysmain is a Windows Operating system service that runs in the background, to improve the system performance and maintain the execution cycles at all times. It analyses the frequently used. To confirm the new settings, click Apply. From now on, the SysMain service will be disabled and will not restart. After disabling SysMain in Windows 10, you should no longer have problems with it related to 100% disk or CPU usage.
What is service host sysmain?
SuperFetch or Sysmain may be a legitimate Windows 10 service. Though this service is to hurry up the apps but some times it start creating issues to some users like high CPU usage and high disk usage. In Windows XP it had been referred to as the Prefetch service and in Windows vista it had been renamed to SuperFetch. Actually both services are same. In Windows 10 After 1809 update it had been renamed to Sysmain but the thing is same.
How to Disable SysMain Service or Service Host SysMain?
Here is a Step by Step method to disable this service from the Windows 10…
Step 1: Click on the search in the left bottom hand corner of your screen and search for services.
Step 2: In the search Result click on services.
Step 3: find and select SuperFetch in the service list and click on STOP in the left hand side top corner.
Step 4: Right click on SuperFetch open Properties and disable startup type.
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So your PC starts to lag suddenly. You open task manager and saw Service Host SuperFetch is using 100% of disk usage. You panicked thinking that superfetch is a virus and how you can disable it. If you disabled it then what changes will it make to my system, will it cause any system instability? Well let check it out.
Contents
- How to Disable Service Host Superfetch
What is Service Host Superfetch
Superfetch is a Windows service which runs in background and analyze the RAM usage patterns. It keeps learning which apps you use most often and it mark these apps as frequently used apps.
These frequently used apps are then preloaded in the RAM ahead of time.
Now since these apps are already preloaded in RAM they will launch much faster. This is the concept of Superfetch. Overall SuperFetch tries to decrease apps loading time by pre-loading them ahead of time.
Is Superfetch Important?
Superfetch is not very important system service, If you have an above average PC with good RAM then you shouldn’t worry about superfetch. It would improve the app loading time. If you have a low end PC with 4 GB RAM then you might run into problems with superfetch. Since superfetch sits in background it uses some system resources. You might face High CPU/Memory usages in Windows 10 sometimes.
Note – If you are using an SSD then you won’t see any different in the app loading time.
Shall I Disable Service Host Superfetch?
Superfetch doesn’t always cause high CPU usages. It’s how this service works, The services starts to fill up RAM with apps used frequently. Since the file size increases overtime, it takes time to sort the memory.
If you face high CPU usages continuously then you can disable superfetch service, it won’t cause any system instability.
Disable SuperFetch For Gaming?
Now lets talk about shall you disable this service for gaming. Superfetch has been know to cause performance issues while gaming. If you use your PC for gaming then you should disable Service Host Superfetch. It would optimize your gaming performance. You can check below methods to disable this service.
How to Disable Service Host Superfetch
Below are few methods which you can use to disable this service.
Using Command Prompt
You can stop superfetch service using some command in the command prompt.
- Search for cmd in the start menu, right click cmd and select Run as administrator.
- In command prompt type : exe stop Superfetch and press enter.
- Now type “sc config sysmain start=disabled” and press enter. This will disable the superfetch service.
Using Services
- Press Windows + R to open the run window.
- In the run Window, type services.msc and press enter.
- This will open MS Services, here you will find list of services which you can start or stop.
- Now look for superfetch service, right click on it and select properties.
- In properties, select the start up type as Disabled. This will disable Superfetch service.
Using Windows Registry
- Again Press Windows + R to open the run window.
- In the run window type regedit and hit enter.
- This will open the Windows Registry.
- Now here navigate to HKEY_LOCAL_MACHINE> SYSTEM > CurrentControlSet > Control > Session Manager > MemoryManagement > PrefetchParameters
- On the right hand side you will find Enable Superfetch.
- Double click on it and set it’s value to 0.
- This will disable the Service Host SuperFetch
If you don’t find the Enable superfetch option then follow the below steps:
- Right click on the PrefetchParametersfolder and select New > DWORD value.
- In the value section enter 0 and click on OK.
- Now restart your PC and check task manager. The Service Host SuperFetch will be disabled.
Service Host Sysmain High Disk
I hope you have successful disabled Service host superfetch service and fixed it’s high CPU usage. If you face some issues then do let me know in the comment section.
Service Host Sysmain High Memory Usage Foam
Interesting stuff! I’ll probably share this with some of my friends. Thanks again for posting it.