Superfetch - Windows Vista Service
Maintains and improves system performance over time.
This service also exists in Windows 10, 11, 7 and 8.
Startup Type
| Windows Vista edition | without SP | SP1 | SP2 |
|---|---|---|---|
| Starter | Automatic | Automatic | Automatic |
| Home Basic | Automatic | Automatic | Automatic |
| Home Premium | Automatic | Automatic | Automatic |
| Business | Automatic | Automatic | Automatic |
| Ultimate | Automatic | Automatic | Automatic |
Default Properties
| Display name: | Superfetch |
| Service name: | SysMain |
| Type: | share |
| Path: | %WinDir%\system32\svchost.exe -k LocalSystemNetworkRestricted |
| File: | %WinDir%\system32\sysmain.dll |
| Error control: | ignore |
| Object: | LocalSystem |
| Privileges: |
|
Default Behavior
The Superfetch service starts as LocalSystem and runs in a shared process of svchost.exe. If Superfetch fails to load or initialize, Windows Vista startup proceeds. No warning is displayed, but the error is recorded into the Event Log.
Dependencies
The Superfetch service won't start, if the following system components are stopped or disabled:
Restore Default Startup Type of Superfetch
Automated Restore
1. Select your Windows Vista edition and Service Pack, and then click on the Download button below.
2. Save the RestoreSuperfetchWindowsVista.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 Vista installation media.