all excited to play Brigmore Witches but the game simply will not load after installing the DLC.

Never had an issue with DH prior to this.

Description of error:

The game gets to the Zenimax screen that lists all the credits for this and that tech/company involved in the game and then Windows delivers a "Program not working" message and will now close.

Had a similar problem occur recently with Remember Me. In that instance it was an obscure dll file that hadn't been copied over.

Anyone else experiencing same problem? Help? Bueller?

You might want to verify the cache files. See link below

https://support.steampowered.com/kb_article.php?ref=2037-QEUH-3335

Figured it out Gstaff.

For whatever reason, in the file folder common/steamapps/Dishonored/Binaries/redist the physx installer did not execute during installation of the DLC. I ran that exe and everything works now.