The 'MSU to CAB Converter' converts your Microsoft Updates to CAB files which you can use to integrate into your Windows Image or use the CAB Installer to integrate them into your current OS. Step 1: Adding the Updates Click 'Add Updates' and select the MSU files you wish to convert, you will then see them adding to the list. Step 2: Click Start Click 'Start' and select where you want the MSU files to go Step 3: Wait Wait for the files to convert, files will go green when once they have done.