# Extracting CAB files from Microsoft Update Standalone Package (MSU)

When manually downloading a Microsoft Security Update or hotfix for Windows 7 (Vista) you typically get a file with an MSU file extension. A file with an MSU extension is a Microsoft Update Standalone package. Microsoft Update Standalone Packages are installed through the Windows Update Standalone Installer WUSA.EXE which is located in the  C:\Windows\system32 folder. If you need to install many updates you could create a script like the one below. SET HOTFIXSRC=<folder that contains Read More …