This site is being deprecated.
Please see the official X‑Plane Support page for help.
Fresh install on a Windows 7 PC 64-bit demo. Both 64-bit and 32-bit EXE popup this message:
There was a problem processing a GLSL pixel shader
Then the program terminates.
You didn't attach your log.txt so I have no idea what type of system specs you have. Did you double check to make sure you meet the minimum system requirements to run X-Plane 10?
If your computer does not meet those requirements, you can still try the X-Plane 9 demo that works better with older computers.
This site is no longer being actively maintained.