How to Troubleshoot Slow or Unresponsive Acrobat Pro DC
Question details
The user is experiencing severe performance issues where the PDF application becomes slow, hangs, or constantly shows a 'Not Responding' error after a software update.

- Product
- Adobe Acrobat Pro DC
- Device & OS
- not provided
- Scenario
- Opening, viewing, or editing PDF files after a recent software update has been installed.
- Observed behavior
- The application frequently hangs or enters a 'Not Responding' state, requiring constant restarts. Running a Repair Installation does not resolve the issue.
Ensure your computer meets the system requirements for the latest application version, and save any ongoing work in other programs in case a system restart is necessary during troubleshooting.
Identify the Issue Trigger and Update Software
Determine exactly when the application hangs to isolate whether the issue is file-specific or system-wide, and ensure you have the latest patch.
Software updates can sometimes introduce bugs that cause the application to hang. Isolating the exact trigger of the freeze will help determine if a specific file is corrupted or if the application itself is failing.
Open the application. On Windows, navigate to 'Help' > 'About Acrobat'. On macOS, click 'Acrobat' > 'About Adobe Acrobat'. Note the exact version number.
Open the application without clicking on any specific PDF file. Wait a few moments to see if the program hangs upon launch or if it remains stable.
Try opening a completely different, simple PDF file. If the program works fine, the original PDF file may be corrupted or overly complex.
Go to 'Help' > 'Check for Updates' to see if a newer patch has been released to fix the known bug causing the unresponsiveness.

Gather Details and Escalate to Support
If basic checks and repair installations fail, document your system specifications and contact official support for a targeted resolution.
Try WPS Office as a Lightweight, Reliable PDF Alternative
If your current PDF software continues to crash, freeze, or display 'Not Responding' errors, consider switching to WPS Office. It provides a lightweight, fast, and highly stable built-in PDF reader and editor, ensuring a smooth experience without the heavy system load.
- 1. Download and Install: Download WPS Office for free from the official website and follow the simple installation prompts.
- 2. Set as Default PDF Reader: Right-click any PDF file, select 'Open with', choose WPS Office, and check the box to always use this app.
- 3. Enjoy Lag-Free Editing: Open your large or complex PDF files instantly without worrying about the application hanging or freezing.

Frequently Asked Questions
Why does Acrobat show 'Not Responding' after a recent update?
Updates can occasionally introduce software bugs, conflict with your specific operating system version, or cause file corruption during the installation process. This disruption causes the application to fail when processing background tasks, resulting in a 'Not Responding' state.
How do I perform a Repair Installation in Adobe Acrobat?
On Windows, open Acrobat, click on the 'Help' menu at the top, and select 'Repair Installation'. The software will verify its core files and attempt to replace any missing or corrupted components automatically.
Can the size of a PDF file cause the application to freeze?
Yes. Exceptionally large PDF files, or documents containing complex vector graphics, high-resolution uncompressed images, and heavy interactive elements, consume significant system memory. If the software struggles to allocate this memory, it may temporarily hang or crash.




