I have the same Problem. Expansion installation has stopped, frozen..I updated Navigraph 1503; I've closed FSX, would try once more but then appeared onother Problem. FSX works no more. Fsx Loads, starts but I see no FSX window. If I try to close FSX then message "would yyou realy close FSX?" So FSX runs, but show no window!! I have no idea what to do.