Testing installers on Windows OS

The objective is to develop an automatic system that tests installers on windows OS. It will include: - IE, Firefox, chrome browsers homepage updated or not. - IE, Firefox, chrome browsers default searching engine updated or not. - Toolbar installed or not on IE, Firefox, chrome - Links on installer wizard screens work fine. - Buttons on installer wizard screens work fine. Validations on several versions of each browser. We think that should be used vmware or similar virtual machines to test each version of browser and each combination of wizard installer. - Toolbar YES, homepage YES, default searching engine YES. - Toolbar YES, homepage NO, default searching engine NO. - Toolbar NO, homepage YES, default searching engine YES. - Toolbar NO, homepage NO, default searching engine YES. - ? - Toolbar NO, homepage NO, default searching engine NO.