Other PDF Issues

Fix Acrobat or Reader Freezing When Commenting on PDFs

Kushani NimanthikaKushani Nimanthika Nov 5, 2026 868 views

Question details

Users experience application crashes and freezing when attempting to add comments or annotations to PDF files using Adobe Acrobat or Reader.

How to Fix Acrobat or Reader Freezing While Commenting on PDFs
Product
Adobe Acrobat / Adobe Reader
Device & OS
not provided
Scenario
Adding comments, highlights, or text notes to a PDF document.
Observed behavior
The application suddenly freezes, becomes unresponsive, and closes without saving the comments.
Before you start

Before troubleshooting the application, ensure you have saved a backup copy of your PDF file to prevent any data loss during an unexpected crash.

Solution 1Recommended

Update Adobe Acrobat or Reader to the Latest Version

Installing the latest software update patches known bugs and is the most common fix for freezing or crashing issues during PDF annotation.

Software developers frequently release patches to address stability issues. An outdated version of Acrobat or Reader may contain a bug that triggers a freeze when the commenting tool is activated.

1
Launch the Application

Open Adobe Acrobat or Adobe Reader on your computer.

2
Access the Help Menu

Click on the 'Help' tab located in the top menu bar of the application window.

3
Check for Updates

Select 'Check for Updates' from the dropdown menu and follow the on-screen prompts to download and install any available patches.

4
Restart and Test

Once the update is complete, restart the application. Open your PDF and try adding a comment to verify the issue is resolved.

Update Adobe Acrobat or Reader to the Latest Version
Tip: Enable automatic updates in Acrobat's preferences to ensure your software remains stable and secure over time.
Free Microsoft Office alternative

Use WPS PDF for Stable and Smooth Commenting

If your current PDF reader continues to freeze and disrupt your workflow, consider switching to WPS Office. It includes a highly stable, lightweight, and completely free PDF reader and editor that allows you to add comments, annotate, and manage PDFs without performance issues.

  1. 1. Download and Install WPS Office: Get the free WPS Office suite from the official website and install it on your PC or Mac.
  2. 2. Open Your PDF: Launch WPS PDF and open the document you wish to review.
  3. 3. Annotate Smoothly: Navigate to the 'Comment' tab to instantly add highlights, shapes, and sticky notes without software lag.
Seamless compatibility with standard PDF formats, Microsoft Office documents, and Adobe files.Lightweight architecture prevents application freezing and crashing during heavy annotation tasks.Completely free PDF reading, commenting, and page management features.Familiar tabbed interface for easily managing multiple open documents simultaneously.
QA img-9

Frequently Asked Questions

Why does my PDF software crash only when I click the comment tool?

This specific trigger usually occurs due to an outdated software version, corrupted application preference files, or conflicts with specific fonts that the comment tool is trying to load from your operating system.

Can a corrupted PDF file cause the entire application to freeze?

Yes. If a PDF contains malformed code, broken interactive elements, or corrupted graphical layers, attempting to modify it by adding a comment can overwhelm the software's rendering engine and force the application to freeze.

Will I lose my PDF comments if the application unexpectedly closes?

Generally, yes. Any unsaved changes, including newly added comments or annotations, are lost when the application crashes. It is highly recommended to save your work frequently using the Ctrl+S (or Cmd+S on Mac) shortcut while editing.