Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .msu

1 extension(s) and 0 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .msu file?
  • Which program can create the .msu file?
  • Where can you find a description of the .msu format?
  • What can convert .msu files to a different format?
  • Which MIME-type is associated with the .msu extension?
Microsoft Windows Vista Update Package .msu file icon

Microsoft Windows Vista Update Package

MSU file is a Microsoft Windows Vista Update Package. The Windows Update Stand-alone Installer (wusa.exe) uses the Windows Update Agent API to install update packages. Update packages have an .msu file name extension.
Category: Archive files
Program name: wusa.exe
Mime-type: application/microsoftupdate
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Microsoft Windows Installer Package
Microsoft Windows Installer Data

Other types of files may also use the .msu file extension. If you have helpful information about .msu extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

LANsurveyor Map
Infinity Engine ACM Playlist Data
BrainVoyager QX Mask Data
MaxL Shell Script
Simple MUsical Score Document
GraphicUSB Capture Data
MultiExchange Unit Configuration File
MicroSyn Data
Microsoft Windows Installer Package

The .msu filename extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

lsu (1), nsu (1), mus (1), msy (1), msj (1), msh (1), mqu (1), mcu (1), su (1), mxu (1), mu (1), msk (1), msi (1), ms (1), meu (1)

Can't open a .msu file?

If you want to open a .msu file on your computer, you just need to have the appropriate program installed. If the .msu association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.msu

To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select from a list of programs that are installed on your computer.

To change file associations:

  • Right-click a file with the extension whose association you want to change, and then click Open With.
  • In the Open With dialog box, click the program whith which you want the file to open, or click Browse to locate the program that you want.
  • Select the Always use the selected program to open this kind of file check box.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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