Crashes of one form or another seem to happen to me and nearly everyone I know who has the program. If you go to the MS FS2000 web site you can download the latest 10mb update patch...but even the readme file on it says that it won't fix all of the known faults in the program.
FS2000 link:
www.microsoft.com/games/fs2000/downloads_fsupdate.htm
[This message has been edited by clownfish (edited 06 January 2000).]