safe file


Superfetch Service Host

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sysmain.dll. What is it?

The sysmain.dll is a Superfetch Service Host.

This file is part of Microsoft® Windows® Operating System. Sysmain.dll is developed by Microsoft Corporation. It’s a system and hidden file. Sysmain.dll is usually located in the %SYSTEM% folder and its usual size is 1,184,768 bytes.

Important: malware can mask itself as sysmain.dll.


The sysmain.dll process is safe and disabling it can be dangerous, because programs on your computer need it to work correctly. Some other processes use the same file name.

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General Information

Security risk: Free spyware & virus scanRegistry Errors: Free scan (run Registry Cleaner)Uninstallation: N/A Uninstall (run Unistall Manager)Disk & Memory Usage: N/A Free scan (run Task Manager)


Author: Microsoft CorporationProcess: Superfetch Service HostPart Of: Microsoft® Windows® Operating SystemCommon path(s): %SYSTEM%
subfolder in %WINDOWS%
Keywords(s): systemFilesize(s): 1,184,768 bytes, 574,976 bytes, 1,159,168 bytes, 1,053,184 bytes, 558,080 bytes

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