This site is being deprecated.
Please see the official X‑Plane Support page for help.
Please try attaching your log.txt again--it didn't work the first time. Does you computer meet X-Plane's hardware specs? Even if it meets the minimums, if you have a lot of detail in your scenery, lots of clouds, etc, it can make it very slow. You could try adjusting the rendering settings. I would recommend trying the medium or low preset buttons and restarting to see if it helps.
This site is no longer being actively maintained.