i am going away on a driving holiday on friday so thought i would update my maps. i have connected it and now maps say corrupt,. i have done the settings thing and reset all on my drive. downloaded it all. uninstalled it all but nothing. i have trid 2 computers and bothe get to about 8 to 10 percent and then it says 100% and says soerry we cant install. please help as i am travelling nearly the full lenghth of the country and i really do need it.