MSIZAP - Zaps (almost) all traces of Windows Installer data from your machine.
Copyright (C) 1999 Microsoft Corporation.  All rights reserved.

Usage: msizap *FRP?A! [product code]

       * = remove all Windows Installer folders and regkeys;
           adjust shared DLL counts; stop Windows Installer service
       F = remove all Windows Installer folders
       U = remove %USERPROFILE%\msi, AppData\Microsoft\Installer folder
       R = remove all Windows Installer regkeys
       P = remove In-Progress key
       N = remove Windows Installer products from Uninstall key
       V = stop Windows Installer service
       T = remove all info for given product code
       A = for any specified removal, just change ACLs to Admin Full Control
       ? = verbose help
       ! = force 'yes' response to any prompt

CAUTION: Products installed by the Windows Installer may fail to
         function after using msizap