Windows 10 and opening / printing PDFs - user gets the save as box

On a windows 10 desktop, 2 machines have deveioped this issues:

Click on a link to open a PDF, like this:

and rather than open it in the browser (chrome, firefox, edge, ie all have same issue), they get a save as box.

I opened acrobat reader and set that as the default app for PDFs.

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Jose Gabriel Ortega CastroCEO Faru Bonon IT - EE Solution ExpertCommented:
JohnBusiness Consultant (Owner)Commented:
Do you have the options in Adobe set as shown below?
What version of Adobe are you using on Windows 10?

DonNetwork AdministratorCommented:
How to change browser download settings for PDF files

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