1 To start the Office Configuration Analyzer Tool, click the Microsoft Office Configuration Analyzer Tool icon on the Start menu. 2  Note, if you are using Windows 8, search for OffCAT on the Start Screen to launch OffCAT. Open Control Panel. 2  In Control Panel under Programs, select Uninstall a program. 3  In the list of currently installed programs, select Microsoft Office Configuration Analyzer Tool 2.1, and then click Uninstall.