Why does this happen?
Windows 10 File association protection mechanism is actually what that prevent any form of direct change to the User Choice in the registry for each form of a file. Whenever any no file association is found in the registry or in case any of the application incorrectly makes the hash void to “UserChoice registry key” to the set association then it triggers resetting of files for that program, making it switch back to the default Windows 10 set association. This means that Edge will or may take over the PDF file default setting due to any reason, after an update or any other cases, and you will be notified about the app reset to default setting by the Action Center. What are the possible solutions to this problem? Let us have a glance.
Method 1: Using Settings
Click on your desired application to make it default for pdf reading e.g. Adobe Acrobat Reader
Method 2: Using Context Menu
You can change the default app for opening any kind of app just by right-clicking the file and selecting an option from there as well. Follow the steps given below to change the default apps for any file Now whenever you will run the file, it will open through the newly set default app.
Method 3: Using the Control Panel
Now close the window. Now .pdf files always open in your selected app.
Method 4: Using Registry Editor
Remember the number in its Data section. Note the number or take a picture
Now go to this address HKEY_CURRENT_USER\SOFTWARE\Classes\ AppXd4nrz8ff68srnhf9t5a8sbjyar1cr723. You can do that following the steps given below Once you are done, Microsoft Edge won’t override the default apps anymore. However, after updating your Windows, you might want to repeat this process because Microsoft Edge tends to override the settings once Windows is updated.
Method 5: Renaming Edge Launcher Files
If all the above methods don’t work or Edge resets the file association after each Windows update, you can try renaming the Edge launcher files. Since the computer will only search for specific named files, it wouldn’t find them because you have renamed them. First, we will navigate to the directory and take permission of the Edge files. After we have the permission, we can easily rename them. Make sure that you are logged in as an administrator to perform this solution. to names like If you do not have ‘MicrosoftEdgeCP.exe’ and instead have ‘MicrosoftPdfReader.exe’, rename it.
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