I tried to update my TomTom Home software on the PC (windows 8.1) to update my Mazda car SD navigation card that is connected but it fails. The update service gives an error that it cannot reach/access the Window installer service with error 1719. I checked the service with msconfig and it normally runs. Under services I can turn windows installer off and on so it must function. The msiexec.exe runs normally too. So I do not understand why the Tomtom msi file will not run. I also downloaded the installer software from TOMTOM and then tried to install it but with the same result. I removed the old ToTom version also completely with revo uninstaller but nothing works.