This site is being deprecated.
Please see the official X‑Plane Support page for help.
Did you check to make sure your computer meets at least the minimum requirements to run X-Plane 10? You might try downloading it again from here just to make sure the download wasn't corrupted. Does the program start enough to give you a X-Plane Installer log.txt file on the desktop? If so, please attach it to a comment.
This site is no longer being actively maintained.