How to install a msu file

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Inside a msu file (a file with the extension msu) there can be Windows updates (security updates, critical updates, updates, update rollups or hotfixes) or downloadable setup packages.

msu stands for Microsoft Update Standalone Package.

To install an .msu update package, you can either double click it, or run Wusa.exe together with the full path of the file:

wusa.exe <pathtofile>\<filename.msu>

You can also double-click the .msu file to install the update package.

If you want to see the content of the msu file use the expand command:

expand -f:* “<filename.msu> %TEMP%

The content of the msu file is now in your temp folder.

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