In the application settings, I disabled the checkbox "General" > "Tell me if Adobe Acrobat is not my default application". Despite this setting, I constantly get Windows Notifications from Acrobat Reader telling me I should set Adobe Acrobat as default reader. If I completely disabled all Acrobat Reader notifications using OS settings, I would also miss useful noticiations. Stop annoying users with this notification if they clearly do not want to see it.