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How to Fix Adobe Acrobat 9 and Reader DC Default PDF Conflicts
Question details
Users experience conflicts when opening PDF files locally or from a browser due to having both an obsolete version of Adobe Acrobat (version 9) and a modern Acrobat Reader DC installed simultaneously.
- Product
- Adobe Acrobat 9 and Acrobat Reader DC
- Device & OS
- Windows and macOS
- Scenario
- Attempting to open PDF documents either locally from the file system or directly through web browser downloads.
- Observed behavior
- PDF files fail to open correctly, launch the wrong application, or trigger system conflicts because the operating system and browser struggle to prioritize between the legacy Acrobat 9 and the modern Reader DC.
Verify which versions of Adobe software you currently have installed on your system and ensure your operating system is updated to the latest version.
Set a Supported PDF Application as the Default Viewer
Configure your operating system to always use a modern, supported PDF application (like Reader DC) to prevent the legacy Acrobat 9 software from intercepting the files.
Because Adobe Acrobat 9 is obsolete, it lacks the necessary updates to communicate effectively with modern operating systems. Forcing the OS to prioritize a supported application will resolve most local file conflicts.
Navigate to any folder on your computer that contains a .pdf document and right-click on the file.
Select 'Open with' from the context menu, then click on 'Choose another app' (Windows) or 'Get Info' (Mac).
Choose 'Adobe Acrobat Reader DC' from the list of applications. Check the box that says 'Always use this app to open .pdf files' (Windows) or click 'Change All' (Mac), then click 'OK' or 'Apply'.
Configure Browser PDF Download Settings
Adjust your web browser preferences so that downloaded PDFs are saved to your device rather than relying on conflicting browser plugins.
Uninstall the Obsolete Adobe Acrobat 9
Remove Adobe Acrobat 9 entirely from your system to permanently eliminate software conflicts and security vulnerabilities.
Use WPS Office to Seamlessly Open and Edit PDFs
Avoid legacy version conflicts entirely by switching to WPS Office. It includes a built-in, lightweight, and powerful PDF reader and editor that works smoothly on modern operating systems without the hassle of software incompatibilities.
- 1. Download WPS Office: Visit the official WPS website and download the free WPS Office installation package for your operating system.
- 2. Install the Software: Run the installer and follow the quick setup wizard to install the suite on your device.
- 3. Set as Default PDF Viewer: Right-click any PDF file, select 'Open with', choose 'WPS Office', and check the option to always use this app to permanently bypass legacy PDF conflicts.
Frequently Asked Questions
Why is Adobe Acrobat 9 conflicting with Reader DC?
Adobe Acrobat 9 is an obsolete, unsupported version that lacks compatibility with modern operating systems and newer software architectures. When installed alongside the modern Acrobat Reader DC, the system struggles to identify which application should handle PDF protocols, leading to opening failures and freezes.
Can I still safely use Adobe Acrobat 9 on Windows 10 or macOS?
It is highly discouraged. Because Adobe Acrobat 9 is no longer receiving official support or security patches, using it on modern operating systems exposes your device to significant security risks and frequent software crashes.
How do I stop PDFs from automatically opening in my browser?
You can change this by going to your browser's settings (such as Chrome or Edge), navigating to 'Privacy and security' > 'Site Settings' > 'PDF documents', and turning on the option to download PDFs instead of automatically opening them.
