MSU File Type

Written by:   |   Updated: December 05, 2018

Microsoft Silver

MSU File Summary

Only one known software program, Microsoft Windows developed by Microsoft Corporation, is related to the MSU file extension. In addition, they are categorized under a single primary file type, described as the Windows Vista Update Package format. MSU files are categorized ordinarily as System Files.

The MSU File Extension can be viewed on the Windows operating system. They are supported on both desktop and mobile devices. The MSU File Extension carries a Popularity Rating of "Low", meaning that these files are scarcely found in most user's file stores.

Although there is a lot more to know about MSU files, those are the most important details of these types of files. If you are having trouble opening these files, or would like more detailed information, please see our comprehensive information below.

Low
Demand
8389
Ranking

/ 11690

Active

State

5

December

2018

Refreshed

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Varieties of MSU Files


Main MSU Affiliation

.MSU
File Name:.msu
Class:Windows Vista Update Package

This file contains Windows Vista updates or 'hotfix' data. It contains updates for applications and files and installed by the Windows Update Stand-alone Installer.

Company: Microsoft Corporation
Kind:System Files
Subkey: HKEY_CLASSES_ROOT\.msu

Software Programs That Open The Windows Vista Update Package:


Microsoft Windows by Microsoft Corporation

Windows

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MSU Demand


Browser Rankings

Chrome (58.80%)
Firefox (11.05%)
Internet Explorer (9.04%)
Edge (8.46%)
Safari (3.87%)


Sources of MSU Problems


Issues Opening MSU Files

Microsoft Windows is Not Installed

You attempt to load your MSU file and get an error such as "%%os%% Can't Open The MSU File Extension". Usually, this is because you do not have Microsoft Windows for %%os%% installed. Because your operating system doesn't know what to do with this file, you won't be able to open it by double-clicking.


Tip: If you know of another program that can open your MSU file, you can try opening it by selecting the application from the programs listed.


Incorrect Microsoft Windows Version

In other instances, your Windows Vista Update Package file version may not be supported by your version of Microsoft Windows. You will need to download a newer version of Microsoft Windows if you don't have the right version. This issue mainly occurs when your Windows Vista Update Package file was created by a newer version of Microsoft Windows than you have on your PC.


Tip: Sometimes you can get a clue about the version of MSU file you have by right clicking on the file, then clicking on "Properties" (Windows) or "Get Info" (Mac OSX).


Ultimately, most of the difficulties opening MSU files are due to having the wrong version of Microsoft Windows installed.


Other MSU File Issues

Errors opening Windows Vista Update Package files can still occur even with the latest Microsoft Windows software installed on your computer. If you're still experiencing problems opening MSU files, there could be other computer problems. Problems unrelated to software:

  • File references in the Windows Registry for MSU are wrong
  • Corruption of the MSU file description inside the Registry
  • Invalid installation of a MSU-associated program (eg. Microsoft Windows)
  • MSU file corruption
  • Your MSU is infected with malware
  • Device drivers of the hardware associated with your MSU file are corrupt or out-of-date
  • Windows cannot load your Windows Vista Update Package file due to insufficient resources (eg. RAM)

Quiz: Which file extension is the oldest in existence?









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