I have a TomTom SatNav with lifetime map updates. Previously had Windows XP and it worked to update the SatNav as required. The device is only 18 months old, but since upgrading to Windows 10 I am unable to update maps. I have liaised with TomTom and tried all their suggestions to fix this and it appears all the relevant drivers and software etc are working and up to date. However my computer simply shows that the SatNav is not connected. I have now borrowed a friends laptop still running on Windows 7 and this has connected without any problems and installed the required map updates. I think this shows that there is a compatibility issue between Windows 10 and TomTom which needs resolving.