When I click on personalize or display an error box pops up. It says "This file does not have a program associated with it for performing this action. Please install a program or, if one is already installed, create an association in the default programs control panel."

1. What @LeviGarrett explained is for thelock screen.

(The one you swipe upwards before entering your password)

2. This forum is for thelogin screen

(The one where you enter your password)

3. A work around to get to the personalize and display settings is:

Press Windows key → Type Control Panel → Click Appearance and Personalization → Click either Display or Personalize.