My first installation of the 777 resulted in a sim which did not behave properly.  Some years ago, a MS tech told me that you should always build a new fsx.cfg file everytime you install a new addon.  Another told me that corrupt dll.xml files can also cause problems.  So here is what I did, resulting in a smooth operating sim.

 

1. Uninstall the 777 using the control panel "uninstall" function (as recommended by PMDG).

 

2. Deleted the "dll.xml" file.  Usually found at: users\your name\appdata\roaming\microsoft\fsx.  You may have to "unhide" files.

 

3. Make a new "dll.xml" file by running the FSUIPC installer.

 

4. Delete the "fsx.cfg" file found in the same location as #2.  Make a note of all your preferred fsx settings (graphics, scenery, etc.)

 

5. Install the 777. This will install the aircraft and add the needed code to the "dll.xml" file.

 

6. Run fsx.  This will build a new "fsx.cfg" file.

 

7. Modify the fsx settings you noted in #4.

 

8. Fly.

 

I hope this will help some of you to solve some of your problems.

 

I'm with you on everything except deleting the dll.xml. If you do that all of your addons that use startup dll's will not load. You would have to recreate manually, or reinstall all your addons?

 

Tom Cain