Windows 10 File Extensions Messed Up

The internet is full of articles but none work. The big one that doesn't work are .exe, .zip would be next. Doen't microsoft have a fix it or something that will take care of it? At least for the exe there use to be a .cmd file that worked (it was for the sircam). Anyway....
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LockDown32OwnerAsked:
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Joe Winograd, Fellow&MVEDeveloperCommented:
What exactly do you mean by "messed up" and "doesn't work"?
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JohnBusiness Consultant (Owner)Commented:
Open cmd.exe with Run as Administrator and run dism.exe /online /cleanup-image /restorehealth

Allow to complete, restart and try re-associating extensions.  Does this work?

If not, run a non-destructive Windows 10 Repair Install and Keep Everything.

Go to the Media Creation Link

https://www.microsoft.com/en-us/software-download/windows10

Windows 10 is running, so click on the Download button (not Upgrade Button, select Open (Run) but NOT Save. Allow the program to run. Allow drivers to update. Then select Keep Everything.
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JohnBusiness Consultant (Owner)Commented:
Also try a new test Windows User Profile (Account). Log into the new Windows Account and test extensions. The user account could be damaged.
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Hello ThereSystem AdministratorCommented:
Go to the Media Creation Link (https://www.microsoft.com/en-us/software-download/windows10) and use a bootable USB to repair your OS.
Use Download button and run the program. Use 'Keep Everything'.
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JohnBusiness Consultant (Owner)Commented:
Yes. As I posted above
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Hello ThereSystem AdministratorCommented:
Sorry. I was interrupted while writing this post so I posted it after you.

Use DISM command together with sfc/scannow.
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Hello ThereSystem AdministratorCommented:
There is FixEXEC Tool for this case. Not official but working. You can try a simple utility "unassoc.exe" as well.

this is common with certain malware.. little trick to prevent the user from running AV instal, notepad scipts, command line, registry
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Hello ThereSystem AdministratorCommented:
I hope THIS will help you.

Also HERE is a little suggestion.
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Hello ThereSystem AdministratorCommented:
MS also has FixIt Tool that can find the issue and help to fix it. Choose Fix broken desktop shortcuts and common system maintenance tasks.

Before that you can try : go to Settings -> Applications -> Default Apps -> Restore.
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RaminTechnical AdvisorCommented:
You can Download all available Windows 10 file extensions from below link and run all of them at once to restore all Windows Default file associations:

https://www.tenforums.com/tutorials/8703-restore-default-file-type-associations-windows-10-a.html
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LockDown32OwnerAuthor Commented:
The initial symptom was that Adobe Reader wouldn't open PDFs. Not too unusual so I un-installed Reader and re-downloaded it. It is sitting in the downloads folder with no known icon and when I double click it ask me what to open it with. The name was readerdc_en_ra_cra_install.exe so Windows didn't know what to do with an exe

So far dsim hasn't worked and neither has the reg files. Odd. Just odd. No aparent virus.
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JohnBusiness Consultant (Owner)Commented:
That appears to be a redistributed file form Canada Revenue Agency (who does redistribute Adobe Reader).

(a) can you try reinstalling from Adobe.com ?
(b) consider a Repair Install to fix things.
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RaminTechnical AdvisorCommented:
@LockDown32 - Please keep us updated.  Download EXE reg file from this link, right click on it and select Merge. That will fix .exe association file type.

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Link:
https://www.tenforums.com/tutorials/8703-restore-default-file-type-associations-windows-10-a.html
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Hello ThereSystem AdministratorCommented:
Yes, as I suggested before, you can download the registry fix for specific extension.
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LockDown32OwnerAuthor Commented:
After a great deal of looking, searching and googling the problem actually turned out to be in Internet Explorer and what/how it was downloads. Thanks guys.
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JohnBusiness Consultant (Owner)Commented:
You are very welcome and I was happy to help.
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