Now browse into your ‘Windows System32 ’ directory and look for the file ‘wusa.exe’, select it and click OPEN. Now the Windows Update Standalone Installer will be an option within your Open With dialog. Make sure it is selected and press okay. That’s it, now your.msu packages should be working again as normal. I am writing a simple script that will install multiple hotfixes that cannot be added to the WSUS catalog. The hotfixes are placed on a share and are available to any new builds of the OS. All of the hotfixes are.msu files.
Did your computer fail to open a MSU file? We explain what MSU files are and recommend software that we know can open or convert your MSU files.What is a MSU file?
Files that contain the .msu file extension are update installer files that are used by the Windows Vista operating system. Prior to Vista, Windows would use MSI files for system updates rather than MSU files.
Files with the .msu extension contain updates for files and applications. There are four elements contained within each MSU file including the update metadata, a CAB file (or multiple CAB files), an XML file, and a properties file.
The metadata portion of the MSU file describes the update package. The CAB file (or files) contains the actual update data. The XML file contains the information describing the contents of the MSU file.
The properties file is the portion of the MSU file that is read by the Wusa.exe application. The Windows Update utility uses this information to run the update on the user's computer.
Software that will open, convert or fix MSU files
Try a universal file viewer
Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.
About File Extension MSU
File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.
If you have additional information about the MSU file format or software that uses files with the MSU suffix, please do get in touch - we would love hearing from you.