Should I block it?

No, this file is 100% safe to run.

VersionsAdditional versions

6.3.9600.16384 (winblue_rtm.130821-1623) 1.72%
6.3.9600.16384 (winblue_rtm.130821-1623) 0.09%
6.3.9600.16384 (winblue_rtm.130821-1623) 2.75%
6.3.9600.16384 (winblue_rtm.130821-1623) 0.09%
6.3.9431.0 (winmain_bluemp.130615-1214) 0.19%
6.3.9431.0 (winmain_bluemp.130615-1214) 0.03%
6.2.9200.16384 (win8_rtm.120725-1247) 2.59%
6.2.9200.16384 (win8_rtm.120725-1247) 15.63%
6.2.9200.16384 (win8_rtm.120725-1247) 0.53%
6.2.8400.0 (winmain_win8rc.120518-1423) 0.12%
6.2.8400.0 (winmain_win8rc.120518-1423) 0.09%
6.2.8250.0 (winmain_win8beta.120217-1520) 0.03%
6.2.8102.0 (winmain_win8m3.110823-1455) 0.06%
6.1.7600.16385 (win7_rtm.090713-1255) 3.84%
6.1.7600.16385 (win7_rtm.090713-1255) 49.92%
6.1.7600.16385 (win7_rtm.090713-1255) 11.76%
6.1.7600.16385 (win7_rtm.090713-1255) 4.77%
6.1.7600.16385 (win7_rtm.090713-1255) 0.53%
6.1.7600.16385 (win7_rtm.090713-1255) 0.03%
6.1.7600.16385 (win7_rtm.090713-1255) 0.03%
6.1.7600.16385 (win7_rtm.090713-1255) 0.16%
6.0.6000.16386 (vista_rtm.061101-2205) 0.69%
6.0.6000.16386 (vista_rtm.061101-2205) 0.25%
6.0.6000.16386 (vista_rtm.061101-2205) 3.81%
6.0.6000.16386 (vista_rtm.061101-2205) 0.28%

Relationships

sysmain.dll

Superfetch Service Host by Microsoft

Remove sysmain.dll
Version:   6.1.7600.16385 (win7_rtm.090713-1255)
MD5:   bf9ccc0bf39b418c8d0ae8b05cf95b7d
SHA1:   42fb0b19bbe407ad76abf6ff47508c45accbb711
SHA256:   3c13217548be61f2bdb8bd41f77345cdda1f97bf0ae17241c335b9807eb3dbb8
This is a Windows system installed file with Windows File Protection (WFP) enabled.

What is sysmain.dll?

SuperFetch is a technology that pre-loads commonly used applications into memory to reduce their load times. SuperFetch attempts to load commonly used libraries and application components into memory before they are required. It does so by continually analyzing application behavior and usage patterns.

Overview

sysmain.dll is loaded as dynamic link library that runs in the context of a process. It configures an autoplay handler withing explorer.exe named MSCreateRdbCache that will launch the program automatically. This version is designed to run on Windows 7.

DetailsDetails

File name:sysmain.dll
Publisher:Microsoft Corporation
Product name:Superfetch Service Host
Description:Microsoft® Windows® Operating System
Typical file path:C:\Windows\System32\sysmain.dll
Original name:sysmain.dll.mui
File version:6.1.7600.16385 (win7_rtm.090713-1255)
Product version:6.1.7600.16385
Size:1.66 MB (1,743,360 bytes)
Digital DNA
PE subsystem:Windows GUI
Entropy:6.277687
File packed:No
Code language:Microsoft Visual C++
.NET CLR:No
More details

BehaviorsBehaviors

Autoplay handlers
Runs under the registry key 'SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AutoplayHandlers\Handlers'
  • Handler name 'MSCreateRdbCache'
Hosted services
Runs as a shared service under the Windows svcHost
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
  • Shared name is 'SysMain'
Scheduled tasks
  • The task 'WsSwapAssessmentTask' runs in the path '\Microsoft\Windows\Sysmain\WsSwapAssessmentTask'
  • Entry path '\Microsoft\Windows\Sysmain\WsSwapAssessmentTask'

Windows OS versionsDistribution by Windows OS

OS versiondistribution
Windows 7 Home Premium 38.50%
Windows 7 Ultimate 15.00%
Windows 8.1 15.00%
Windows 8.1 Pro 9.50%
Windows 7 Professional 9.00%
Windows 8.1 Single Language 4.00%
Windows 8.1 Pro with Media Center 1.50%
Windows 8 Enterprise N 1.50%
Windows 8 Single Language 1.50%
Windows 8.1 N 1.00%
Windows Seven Black Edition 1.00%
Windows 7 Home Basic 1.00%
Windows 8.1 Enterprise Evaluation 1.00%
Windows Vista Home Premium 0.50%

Distribution by countryDistribution by country

United States installs about 54.50% of Superfetch Service Host.

OEM distributionDistribution by PC manufacturer

PC Manufacturerdistribution
Dell 26.22%
Hewlett-Packard 16.48%
ASUS 16.48%
Toshiba 11.24%
Acer 10.49%
Sony 6.74%
Lenovo 5.24%
Intel 2.25%
Alienware 1.87%
Samsung 1.50%
GIGABYTE 1.50%
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