How to Stop Edge From Hijacking Your PDF or HTML Associations

Windows 10’s file association protection mechanism prevents direct changes to the UserChoice area of the registry for each file type. When no file association (user choice) is set in the registry or if an application makes the hash void by incorrectly writing to UserChoice registry key to set associations, this triggers a reset of file association for that file type, going back to Windows 10 defaults. For instance, Edge may takeover your PDF file associations after an update, or due to the above mentioned reasons and the Action Center notifies you that an app default was reset.Read more