It won't run!

[plutomaniac]

Try a clean reinstallation.

1) Uninstall the game via steam (delete local content).
2) Go to C:\Program Files (x86)\Steam\steamapps (or similar, I don't remember the exact path by hard) and delete Amnesia The Dark Descent folder.
3) Go to Documents and delete the folder Amnesia (if you want, backup any saves made there first)
4) Go to C:\Users\-YOUR-USER-NAME-\AppData\Local\VirtualStore and search for anything relating to Amnesia (either Program Files or Documents). Then delete them.
5) Reinstall Amnesia via Steam and then do a file integrity check.
6) Try to run the game now.

If after all that it fails again, attach HPL.log file after the issue occurs as mentioned at the troubleshooting guide, Problem X.