Fix Adobe Reader Cannot Open Two PDFs from a Network Drive
Question details
The user is unable to open multiple PDF files simultaneously from a network drive using Adobe Reader.

- Product
- Adobe Reader
- Device & OS
- not provided
- Scenario
- Attempting to open a second PDF file stored on a network drive while one PDF is already open.
- Observed behavior
- The first PDF opens successfully, but the second PDF fails to open, often related to Protected Mode conflicts or network permissions.
Ensure you have a stable connection to your network drive and that you possess the necessary read and write permissions for the folder containing the PDFs.
Update Adobe Reader and Test Files Locally
Updating to the latest version fixes known bugs, while testing locally isolates whether the issue is network-related.
Software updates often contain patches for known network compatibility and security feature bugs. By updating Adobe Reader and copying the files to your local drive, you can determine if the network drive itself is causing the restriction.
Open Adobe Reader, navigate to the top menu, and click on 'Help', then select 'Check for Updates'. Install any available updates and restart the application.
Navigate to your network drive, copy the two PDF files you want to open, and paste them into a local folder such as your Desktop.
Double-click both local PDF files to open them simultaneously. If they open successfully, the issue is tied to network policies or permissions.

Troubleshoot Protected Mode and Group Policies
Protected Mode restrictions or IT group policies can block multiple network files from opening simultaneously.
Open Multiple PDFs Effortlessly with WPS Office
Bypass Adobe Reader's network drive restrictions by using WPS Office's built-in PDF reader. It smoothly handles multiple PDF tabs, supports direct network drive access, and provides a lightweight, fast viewing experience.
- 1. Download and install: Download and install WPS Office from the official website on your computer.
- 2. Set as the default reader: Right-click your PDF file on the network drive, select 'Open with', and choose WPS Office. You can check the box to always use this application for PDFs.
- 3. Open multiple files concurrently: Double-click your second PDF on the network drive. WPS Office will open it seamlessly in a new tab alongside the first document, bypassing traditional Protected Mode errors.

Frequently Asked Questions
Why does Protected Mode block PDFs on a network drive?
Protected Mode restricts what a PDF file can do to protect your computer from malicious scripts. Sometimes, it misinterprets the behavior of accessing multiple files across a network drive as a potential security threat, actively blocking subsequent files from opening.
Should I permanently disable Protected Mode in Adobe Reader?
No, permanently disabling Protected Mode is not recommended as it significantly reduces your system's security. It should only be disabled temporarily for troubleshooting purposes.
How do I know if the issue is a Group Policy restriction?
If you copy the PDF files to your local hard drive and they open concurrently without any issues, but fail when accessed directly from the network drive, the problem is highly likely related to a network Group Policy or permission set by your IT administrator.
Can I use alternative software to open PDFs on a network drive?
Yes, you can use alternative office suites like WPS Office, or even web browsers like Chrome or Edge, to open multiple PDFs directly from a network drive without running into Adobe's specific security restrictions.




