While updating to 6u7 using "http://jqa.ireland.sun.com/update/1.6.0/map-1.6.0_07.xml" as UpdateServletURL Windows Installer message "This installation package could not be opened. Verify that the package exists and that you can access it, or contact the application vendor to verify that this is a valid Windows Installer package" is shown(see attached screenshot). After closing message JRE successfully installed.