FIX!!! CANNOT OPEN PDF FILES IN WINDOWS 7, 8 1, 10
Right-click the PDF, choose Open With — Choose default program (or Choose another app in Windows 10).
Choose Adobe Acrobat Reader DC or Adobe Acrobat DC in the list of programs, and then do one of the following:
(Windows 7 and earlier) Select Always use the selected program to open this kind of file.
(Windows 8) Select Use this app for all .pdf files.
(Windows 10) Select Always use this app to open .pdf files.
Click the Search icon.
Type “Reader” (no quotes), then hit Enter.
Go to the top menu and click Edit.
Once you’re inside the Edit menu, look for Preferences and click it.
A new window will show up. Click Security (enhanced).
Under the Sandbox Protection options, uncheck the box beside “Enable Protected Mode at startup”.
You will be asked if you want to continue with the changes. Click Yes.
Reasons behind PDF not opening in Windows 10
If you seem to have trouble opening PDF files on your Windows computer, it is likely that it has something to do with a recent Adobe Reader or Acrobat installation/update. On the other hand, PDF not opening in Windows 10 can also be caused by errors brought by an operating system upgrade. Here are some of the factors that may prevent you from opening files in Adobe Reader or Acrobat:
Outdated Acrobat or Adobe Reader
PDF files which have not been created using Adobe programs
Damaged PDF files
Installed Acrobat or Adobe Reader may be damaged
PDF files with malicious data
Applies to :
How to Fix PDF Reader Not Working In Windows 10/8.1/7
How to Fix Adobe PDF Reader Not Working Issues in Window
How to Fix Adobe PDF Reader Not Working Issues In Windows
Fixed 100%: Adobe Acrobat DC has Stopped Working Windows
Can’t Open PDF Files On Windows – Quick Fix
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