Windows 10: "Choose default Options" is missing under "Default Apps" settings page

screenshot: https://imgur.com/a/hnwSDrm

:)

 

Choosing Default Apps & Insider Programme

To resolve your concern, kindly choose the default apps by file type. To do this, follow these steps:

• Click the Windows logo (Start button).
• Click the gear icon (Settings).
• Choose System.
• Select Default apps.
• Click Choose default apps by file type.
• Check all of the video file type, and then check if you can change the default app to your preferred application.

After performing the steps, kindly share with us the result

 

.iso extension missing from settings/choose default apps by file type

This ties partly into my other issue of not being able to mount ISO files in windows explorer. I am getting no luck on fixing that separate issue, so maybe if i tackle it at a different angle, the other problem could be solved as well. Please do not move this issue to Virtualization.



The Issue

Basically, in my "Choose default apps by file type" settings window, the .iso extension is missing. I am running Windows 10 Home Version 1809



In the past, it was there, and also in the past, I was able to mount .iso files by right clicking, and selecting "mount". The option to mount is still there;





But gives me this error;





(this is part of my secondary issue being taken care of in another thread (hopefully)) so please don't move this thread to virtualization.

What I want:

I want the .iso extension back in my list of extensions in my settings --> default apps--> choose default apps by file type window.


Things I have tried;

• 1) Going to Settings - Indexing Options
  2) Advanced button
  3) File Types tab
  4) Add New Extension to List box, type in extension, (without a period) in this case "iso"
  5) Click OK and Close
• Right clicking any .iso file, and selecting "open with", then selecting "choose another app", and then selecting "Windows Explorer".
• Right clicking any .iso file, selecting "Properties", then selecting the "Change" button under "opens with" and selecting "Windows Explorer".
• Restoring the default Windows file extension through registry fix detailed here with OPTION TWO and selecting the .iso reg file, adding it to my registry, and restarting my pc.
• I created a "fake" extension named .isotest. It successfully appeared in the settings menu(see picture above)
• Ran "DISM /Online /Cleanup-Image /RestoreHealth" in elevated cmd prompt and then "sfc /scannow" in an elevated command prompt. No issues were found.

In the registry, it shows that iso files are opened with Windows.IsoFile. Looking under the reg key, I cannot tell if anything is incorrect. Below are the reg keys associated with Windows.IsoFile and the .iso key in Computer\HKEY_CLASSES_ROOT\















I'm not sure what else to do aside from formatting my pc which I really don't want to do for this issue. Help is greatly appreciated. Please read the whole post before suggesting things please.

Thanks.

 

Firefox not showing up in default apps

Only because your list contained FF . Same list as in Default apps page. You did not have the problem that is treated in this thread.

- - - Updated - - -

I made my desired browser, missing from the list, go into the list by modifying registry entries according to those shown by Kolbicz in blog. You get credit for putting it to our attention.