Amnesia freezes on main menu, crashes.

[Guest]

Try going to Documents and rename the folder Amnesia to Amnesia_OLD.

Ah, then reinstall Amnesia from a freshly downloaded installation file?

To be honest, I have no idea what updates Windows did. I just leave it alone and let it update itself as-and-when.
Earlier today I downloaded and installed the latest AMD drivers for this card but it still didn't help. The previous drivers weren't stock MS ones either - they were AMD but just older, from Sept 2013 or something.