SysMain - Windows 10 Service
Maintains and improves system performance over time.
This service also exists in Windows 11, 8 and Vista.
Startup Type
| Windows 10 version | Home | Pro | Education | Enterprise |
|---|---|---|---|---|
| 1507 | Automatic | Automatic | Automatic | Automatic |
| 1511 | Automatic | Automatic | Automatic | Automatic |
| 1607 | Automatic | Automatic | Automatic | Automatic |
| 1703 | Automatic | Automatic | Automatic | Automatic |
| 1709 | Automatic | Automatic | Automatic | Automatic |
| 1803 | Automatic | Automatic | Automatic | Automatic |
| 1809 | Automatic | Automatic | Automatic | Automatic |
| 1903 | Automatic | Automatic | Automatic | Automatic |
| 1909 | Automatic | Automatic | Automatic | Automatic |
| 2004 | Automatic | Automatic | Automatic | Automatic |
| 20H2 | Automatic | Automatic | Automatic | Automatic |
| 21H1 | Automatic | Automatic | Automatic | Automatic |
| 21H2 | Automatic | Automatic | Automatic | Automatic |
| 22H2 | Automatic | Automatic | Automatic | Automatic |
Default Properties
| Display name: | SysMain |
| Service name: | SysMain |
| Type: | share |
| Path: | %WinDir%\system32\svchost.exe -k LocalSystemNetworkRestricted -p |
| File: | %WinDir%\system32\sysmain.dll |
| Error control: | ignore |
| Group: | profsvc_group |
| Object: | LocalSystem |
| Privileges: |
|
Default Behavior
The SysMain service is running as LocalSystem in a shared process of svchost.exe. Other services might run in the same process. If SysMain fails to load or initialize, Windows 10 start up proceeds. No warning is displayed, but the error is recorded into the Event Log.
Dependencies
SysMain is unable to start, if at least one of the following services is stopped or disabled:
Restore Default Startup Type of SysMain
Automated Restore
1. Select your Windows 10 edition and release, and then click on the Download button below.
2. Save the RestoreSysMainWindows10.bat file to any folder on your hard drive.
3. Right-click the downloaded batch file and select Run as administrator.
4. Restart the computer to save changes.
Note. Make sure that the sysmain.dll file exists in the %WinDir%\system32 folder. If this file is missing you can try to restore it from your Windows 10 installation media.