Sending a PDF file enables us to transfer a document without the risk of other users altering the original data structure. It retains the formatting and how the file document looks no matter who the receiver is and what device he or she uses.
You can open your PDF files in Windows 10 using Adobe Acrobat Reader or Adobe Acrobat PDF viewer. But, there are times when the file cannot be opened or Adobe Reader is getting an error opening one.

Why Won’t Adobe Open My PDF File?
One of the reasons why Adobe Acrobat Reader cannot open a PDF file on PC is an outdated version of the software. You may have also received a damaged PDF file, or suspicious senders transferred the file to you. There may also be a problem with your Acrobat Reader installation.
How to Troubleshoot Issue and Fix Adobe Acrobat Reader Cannot Open or Find a PDF File in Windows 10 PC
If you find yourself not being able to open your PDF files using Adobe Acrobat Reader on Windows 10, there are ways on how you can fix the problem. Check out the methods one at a time and see which one can help you solve the issue.
Method #1 – Install Available Updates on Acrobat Reader

Adobe regularly integrates fixes and security features on its updates to augment the Acrobat Reader and resolve issues from previous versions. Installing available updates can help you fix the PDF error. Here’s how to manually update your Adobe Acrobat Reader software in Windows 10.
- Launch the Adobe Acrobat Reader.
- On the Menu bar, select Help.
- Click Check for Updates.
- The Update Dialog box will appear.
- Click Yes.
- Wait for the process to finish.
- Once done, reboot your computer.
Method#2 – Run Repair Installation
- On the Menu bar, click Help.
- Select Repair Installation.
- Follow the instructions and restart your computer once done.
Method#3 – Disable Protected Mode in Adobe Acrobat Reader

- On the Adobe Acrobat Reader Menu bar, launch the Edit tab.
- Select Preferences.
- A new window will appear. Along the Categories area, scroll down and look for Security (Enhanced). Click to open.
- Look for Sandbox Protections section. Below it, uncheck the Enable Protected Mode at the startup box.
Method#4 – Request a Resend of the PDF File
You may have received a damaged PDF file. There may also have a problem with the transfer or the sending of the files. If that is the case, you can request the sender to resend the file to you. Explain to them that you cannot open the PDF, and sending a fresh copy may help you fix the problem.
Which of the methods above work for you? Let us know in the comments below.