File Extension MSI

.MSI File

File extension: MSI


Notes about the MSI file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The MSI file type is primarily associated with 'Windows Installer File' by Microsoft Corporation. Associates components with features and contains installation control information. Note: This file type can become infected and should be carefully scanned if someone sends you a file with this extension.

Detailed information for file extension MSI:


Primary association: Windows Installer File
Company: Microsoft Corporation
Mime type: application/x-ole-storage, text/mspg-legacyinfo
Identifying characters Hex: D0 CF 11 E0 A1 B1 1A E1 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 3E 00 03 00 FE FF 09 00 06
Program ID: Msi.Package
Related links: How to Create an MSI Package, MSI Packaging Tools

Other applications associated with file type MSI:

  • Cerius2 by Accelrys Software Inc.Cerius2 provides tools for applications in life and materials science modeling and simulation. The identifying characters used for this association are - Hex: 23 20 , ASCII: #
  • TruNEST (Nesting Data) by Magestic Systems, Inc.TruNEST is a nesting program for laying out parts on sheets. These layouts are used in controlling NC machine tools.This extension has been used by Magestic Systems since 1992. The extension is also used by the Magestic product TruPART. This association is classified as CAD/CAM. The Mime types used with this association are: application/trunest. Program ID: MSIfile
File Identifier - TrID
'Identifying characters' used on FILExt.com are
provided by Marco Pontello from his TrID database




To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

Technical data

To view technical data on file-extension MSI click this link to expand/hide the additional area.

System Info for File Extension .MSI

The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly from user systems.

ProgramID: Msi.Package, FileType: Windows Installer Package, AppName: Windows® installer
EXEFile: msiexec.exe

ProgramID: Msi.Package
EXEFile: %SystemRoot%\System32\msiexec.exe /i %1

ProgramID: Msi.Package
EXEFile: %SystemRoot%\system32\msiexec.exe /i %1 %*

ProgramID: Msi.Package
EXEFile: D:\WINDA\System32\msiexec.exe /i %1 %*

ProgramID: Msi.Package
EXEFile: %SystemRoot%2\System32\msiexec.exe /i %1 %*


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