safe file


Installer for the Windows Installer

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instmsiw.exe. What is it?

The instmsiw.exe is a Installer for the Windows Installer.

This file is part of Windows Installer - Unicode. Instmsiw.exe is developed by Microsoft Corporation. It’s a system and hidden file. Instmsiw.exe is usually located in the %SYSTEM% sub-folder and its usual size is 1,499,904 bytes.


The instmsiw.exe process is safe and disabling it can be dangerous, because programs on your computer need it to work correctly.

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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: Installer for the Windows InstallerPart Of: Windows Installer - UnicodeCommon path(s): subfolder in %SYSTEM%
subfolder in %DOCS_SETTINGS%
Keywords(s): systemFilesize(s): 1,499,904 bytes, 2,585,872 bytes

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