Things You'll Need
Instructions
Insert the FSX Install Disc into the DVD-ROM drive. By default, Windows will engage its autoplay feature and load up the main install program for FSX. If autoplay is disabled on your system -- or the autoplay feature does not appear to be working -- load the main install program by clicking on "My Computer" and then clicking on your DVD-ROM drive.
Select "Repair" from the list of available actions in the main install program. Press the "Next" button.
Follow the on-screen instructions to repair your installation of FSX. This restores your default aircraft files.