Fix Acrobat Pro DC Crashing When Editing or Commenting on PDFs
Question details
The user experiences consistent application crashes when attempting to edit or add comments to PDF files in Adobe Acrobat.

- Product
- Adobe Acrobat Pro DC
- Device & OS
- 64-bit Windows 7
- Scenario
- Modifying PDF documents by editing text or adding annotations and comments.
- Observed behavior
- The application crashes immediately during editing or commenting, and standard reinstallation has not resolved the issue.
Before proceeding with these troubleshooting steps, ensure you have saved copies of any open PDF documents to prevent data loss, and verify that your Windows 7 system has all available OS updates installed.
Repair the Installation and Check for Updates
Running the built-in repair tool can fix corrupted installation files that cause Acrobat to crash during PDF editing.
Acrobat Pro DC includes a built-in repair utility that scans for and replaces missing or corrupted application files. This is often the quickest way to resolve unexpected crashes associated with specific tools like editing or commenting.
Open Adobe Acrobat Pro DC on your computer.
Go to the 'Help' menu at the top of the window and select 'Repair Installation'. Wait for the process to complete.
Restart your computer. Open Acrobat again, go to 'Help' > 'Check for Updates' to ensure you are on the latest build, then test the commenting feature.

Disable Third-Party Plug-ins
Conflicting plug-ins, such as the annot.api component, can interfere with commenting tools and trigger a crash.
Perform a Clean Reinstallation using Acrobat Cleaner Tool
If a standard reinstallation fails, using the official cleaner tool removes leftover registry keys and corrupted preferences.
Edit and Comment on PDFs Smoothly with WPS Office
If Acrobat Pro DC continues to crash on your system, consider switching to WPS Office. WPS PDF is a lightweight, highly compatible PDF editor that lets you easily edit text, add comments, and manage PDF pages without heavy system resource demands.
- 1. Download WPS Office: Install WPS Office for free from the official website.
- 2. Open Your PDF: Launch WPS PDF and open the document you wish to edit.
- 3. Edit and Comment: Navigate to the 'Edit' or 'Comment' tab to add annotations, modify text, and highlight sections seamlessly.

Frequently Asked Questions
Why does Acrobat Pro DC crash specifically when adding comments?
This is often caused by a corrupted 'annot.api' plug-in file or conflicting third-party extensions that fail to load properly when the annotation tools are activated.
Will resetting Acrobat preferences delete my PDF files?
No, resetting Acrobat preferences only restores the application's interface and settings to their default state. Your saved PDF documents will remain completely unaffected.
Is Windows 7 still supported by Adobe Acrobat Pro DC?
Adobe has ended official support for Windows 7 for newer versions of Acrobat DC. You may need to use an older supported build or consider alternative lightweight PDF editors like WPS Office for a stable experience.
How do I know if a specific PDF is causing the crash?
Try opening a completely new, blank PDF and adding a comment. If the application does not crash, the original PDF file may be corrupted, heavily restricted, or contain overly complex elements.




