I downloaded the Crash to Desktop Fix DLL file found under the FSX misc. downloads. After reading the included simple instructions, I looked for a current copy of that same UIAutomationcore.DLL file thinking I would be over-writing it. But there is no file with that name in my FSX Acceleration installation root folder.

Since I experience a crash to the desktop while using the menus in flight pretty much at least once every session with FSX, I wanted to try it, so I did paste the UIAutomationCore.DLL file into the FSX folder, and am about to relaunch FSX. But I am wondering if there is supposed to have been some modified copy of that same file already there, or when you say MS modified the original, do you mean they removed it?

Capt.Propwash wrote on Mar 18^th, 2011 at 1:25am:

FSX has no Modules folder. I copied this from the instructions.

Installation
This part is actually so easy that it’s sad.
All you have to do is simply cut the DLL file from its folder, and paste it the Root FSX directory.
C:\Program Files\Microsoft Games\Microsoft Flight Simulator X

No mention of overwriting existing files. There is no file of that name in my FSX. Note that this only affects FSX on Vista/Win7.

Thanks for the replies! After adding the file as instructed I didn't have any more crashes, but typically I would only see this issue once per day. I'll post again if it returns in the future.