File Extension MSU

.MSU File

File extension: MSU
File type: Hotfix Installer Package


Notes about the MSU 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 MSU file type is primarily associated with 'Vista' by Microsoft Corporation. Microsoft uses this file extension as an installer file (older operating systems generally used .MSI).

Detailed information for file extension MSU:


Primary association: Vista
Company: Microsoft Corporation

Other applications associated with file type MSU:




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 MSU click this link to expand/hide the additional area.

System Info for File Extension .MSU

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: Microsoft.System.Update.1
EXEFile: %systemroot%\system32\wusa.exe %2 %3 %4

ProgramID: Microsoft.System.Update.1
EXEFile: %systemroot%\system32\wusa.exe %2 %3 %4 %5 %6 %7 %8 %9


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