Windows 10: file type eg .pdf association random reset

Some time ago, we successfully used, for example, the association of .pdf files with the Adobe Acrobat DC application using a group policy Default Associations Configuration File.Since the beginning of April with UserChoice Protection Driver v2.1 activated, this mechanism has unexpectedly stopped working on many machines.In the "shell-core appdefault" event log, there are entries according to which the protective hash in the registration database is not appropriate eventid: 62440. This hash is set by the shell during each user login there is no change in the relevant registration key in

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microsoft print to pdf files will not open after saving

We suggest that you save the PDF files on your device and check if the issue persists. You may also want to associate the PDF files to Microsoft Edge as the default program to make sure that you have a default application that will open all of your PDF files.
Here are the steps:

• Search for Default Programs.
• Go to Associate a file type or protocol with a program.
• Select the .pdf file type and then click the Change program button on the upper right of the
  Set Associations window.
• Choose Microsoft Edge and then click OK.

Let us know how it goes.

 

PDF file and associated programs/apps

I use WPS Writer for word processing and every time there is an update to the suite it overwrites PDF-Xchange Editor as the default PDF app. I know how to change it back, but having to scroll all the way down that long list is tiresome. Is there some trick
to keep WPS from appropriating the PDF files?

And, while I'm here - how about a search in the file type list and associated programs/apps list?

Thanks in advance for any help.

***Post moved by the moderator to the appropriate forum category.***

 

file type is not included in the list of types to choose from to associate a file with

in "Choose default apps by file type" in Windows 10, there are two file types that are not listed; how do I add a file type to the list so that I can associate that file type with a file. For example, I often receive a file that has a file type of .stmt
and another fle with a file with the name viewdoc.file. They are both PDF files. But neither of these file types are available for me to choose from in the default list. How do I add them?