Maintains and improves system performance over time.
This service also exists in Windows 10, 7, 8 and Vista.
Windows 11 version | Home | Pro | Education | Enterprise |
---|---|---|---|---|
21H2 | Automatic | Automatic | Automatic | Automatic |
22H2 | Automatic | Automatic | Automatic | Automatic |
23H2 | Automatic | Automatic | Automatic | Automatic |
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: |
|
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 11 start up proceeds. No warning is displayed, but the error is recorded into the Event Log.
SysMain is unable to start, if at least one of the following services is stopped or disabled:
1. Select your Windows 11 edition and release, and then click on the Download button below.
2. Save the RestoreSysMainWindows11.bat file to any folder on a local drive such as SSD or a hard disk.
3. Right-click the downloaded batch file and select Properties.
4. Check the Unblock checkbox and click OK.
5. Right-click the batch file again and select Run as administrator.
6. 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 11 installation media.