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Outdated Acrobat or Adobe Reader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

[howlmarkl]

Thank you, the second option worked for me.

[dianalynnhoward]

I am desperate! How can I open the PDF files on a disc to read them? Please help. I need them for my drum lessons. I have Windows 8.

[LeadSurge]

*None of these methods worked. It is associated with the correct app/program (Adobe Acrobat X Pro) on my Microsoft Windows 10 Pro system, and when I double-click the pdf documents (that I've checked are not corrupted bc they open in MS Edge just fine), nothing at all happens. Same when I right-click and choose "open with..." Adobe Acrobat X Pro. Adobe Acrobat X Pro user interface doesn't open, either. Very frustrating that Adobe Acrobat just stopped working. Thank you!*

[JonasGrumby]

I left for lunch today and came back and now my Surface Book 2 says it can not find the .pdf file I am clicking on. It also says it cannot find Acrobat DC. I reinstalled and regedit remove Acrord32.exe and nothing works. I have never had this problem before in 20 years.

[animeshdas]

Thank you bro....bohot bohot sukria..❤❤❤

[tobogganing_ventriloquist_]

Yes, indeed, the number of companies (banks, IRS, etc) that download a PDF file without attaching the *.PDF extension is astounding.
No, I have my Win 10 64 bit computer set so it ALWAYS shows file extensions.

[shatabdichoudhary]

No, other files is opening, while clicking on any file even folder, it open pdf Help

[rithvickram]

it's is fixed bro
thank you so much
this helps me alot for jee mains and advanced exams

[rohansrivastava]

Sir ur video is awesome but sir my pdf file is 0 bytes how would I open??

[laraboo]

Wow I’m a technophobe but this worked Thankyou saved me a visit to the computer shop 👍

[evamagnaye]

Pls help me i cant open pdf files adobe acrobat reader could not open becauae it is either not a supportedfile type or because the file has been damage

[NorsePJ]

Didn't help. There isn't one pfd file I can open now on my computer. They all say the same thing that it could not open the file because it is either not a supported file type or because the file has been damaged. I had no problem with any of these files previously. Makes no sense?

[gabriejz]

it didnt work for me, i cant open any pdf files nor adobe reader for some reason.

[blobropchp]

dude ive uninstalled some of windows store cant reinstall it i watched your video on that win store not working but it didnt worked help me plese

[djtech]

that is adobe payment. we're trying to avoid monthly adobe payment that not usually using.

[c.a.savage]

Got what I needed to know at 1:14. Thank you, thank you, thank you