Thanks for the advice . The present status is as follows---All files are under Administration control. Having installed the programme I opened the FSX file then opened the Captain Sim file which had two files, first a cfg file and Loader.exe which I clicked to open under admin control and was presented with the Account Control option to open. When I clicked OK to open, everyyhing stopped here, no response. Having FSX with Accelation I have Checked F/A-18 but no weapons display. In running the installation I have not been presented wit the options F/A-18 or LX-45. perhaps not significant.