Data will not save

[Luis]

Okay, now for one last thing to try. Your game folder should be 'C:\Program Files\Steam\steamapps\common\amnesia the dark descent\' - try running 'Amnesia.exe' as administrator from there instead. Also, do a check for file integrity in the steam properties window for the game.
If this does not work, try reinstalling the game, and if that also does not work, then I'm out of ideas for now.