Ah can't help you with this one, never had the fatal error problem since a complete rebuild and a change in the way I reinstalled FSX. That is FSX then SP2 then SP2, then Bojote tweaks, then external internal frame limiter program, then ORBX scenery then REX Weather, then Addon aircraft one by one.

It always chokes a bit with the aircraft select however no matter what but comes good, not sure what is going on there but I suspect it is the way Windows (the graphic draw programming like X-Windows) draws and redraws windows but then comes good.

Only real hang up I get is with saved cold n dark or saved flights. For some reason I can never get them to run again properly when they are saved either mid flight or as new start up after I have shutdown and closed FSX , so now I don't bother and I don't have the problem.

The rest seems to be luck! Yeah and they sure could use an SP10 for FSX given all the updates and changes to the Windows operating system in the intervening period I just know one day there will be a new MS update or patch to WIN7 :-/ and nothing in FSX is going to work (Murphy's Law).