Recently Google has announced their Google Map API service is no longer supporting IE8 and IE9; and because Microsoft has also stopped supporting Windows XP and Windows Vista, which means Windows XP/Vista are not able to upgrade the IE browser to IE10 or above version. Below is the announcement from Google Developers:
Because our ezTour and ezTour Plus are using IE to display Google Map, therefore XP/Vista users will have problem using our ezTour and ezTour Plus. Users still can install our ezTour and ezTour Plus on Windows XP/Vista, but the GPS tracks will not displayed on Google Map correctly. For those XP/Vista users who still need to use our ezTour and ezTour Plus, we will recommend to upgrade the OS to Windows 7 or above version.