I have two problems with Adobe Reader DC that, I'm sure, are inter-related:
I have reviewed other recommendations on this forum and elsewhere and believe that I've exhausted all the recommendations. Among the things that have been done:
I would prefer to be using Adobe Reader as my PDF viewer default.
What more can I do to resolve this issue?
Thanks much for any assistance,
I would suggest trying to reset Reader as default PDF Handler: Associate PDF files to always open in Acrobat or Reader on Windows 10 Let us know if that helps. Also, you may check this thread: Re: Windows 10 Taking Over all File Extentions
If you are already have found a solution to this issue, please update this thread with your findings that may help others.
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Only a fresh build of Windows solved this problem.
Both of these solutions are wildly incorrect, here is the correct solution:
Check the bit version of Office and Adobe PDF in control panel > uninstall a program
If one is 32 and one is 64, then you need to make sure they are on the same bit version.
Either go to portal.office.com, download software, and change the bit version you're downloading (either 64 or 32 depending on what version of Adobe you have), or go to the adobe PDF viewer download page, change the version at the bottom of the page, and install the bit version on the left hand side (32 bit is listed as just the "adobe reader" download without a listed bit version).
You DO NOT need to reinstall Windows to make this work, and that suggestion is dangerous.
I agree with Sorrel you should not reinstall Windows as I also used Control Panel repair for Adobe DC. After repair, the File Explorer error went away and preview of PDF worked again. Thanks for the comment Sorrel.