What is a .MSM File And How To Open It – Microsoft (Visual Guide)

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Have you came across a file with the .msm extension, but it is a file you have never seen before? You most likely know what the file is, but you might be unsure on how to open it. Thanks to this easy guide you will be able to find out what .msm file extension is, how to open it and how to work with it.

What is a .MSM file?

The .MSM file extension is Windows Installer Merge Module. This file extension belongs to the developer Microsoft. The format of this file is binary, and it is a settings related file.

What to know

There is currently 1 software that can open the .msm file on 1 platform.

How to open a .MSM file?

Below we have written a comprehensive guide on how to open the .MSM file on various operating systems.

How to open a .MSM file on Windows (7, 8, 10)

To open the .msm file on Windows, please follow these 4 easy steps.

1. The first step is to download the Microsoft Windows Installer software. You will be using this software in order to open the file.

Step 2

Step 2: Locating your .MSM file

2. The second step is locating the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. After choosing the “Open with” option, you will have an option to choose the Microsoft Windows Installer software you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .MSM file?

If you are still unable to open the .MSM file, it might be because you are trying to open the wrong one. There are many similar file extensions that look like the .MSM file.msm – National Instruments. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .MSM file with the Microsoft Windows Installer program on Windows.