Other PDF Issues

Fix Acrobat Pro DC 2015 Crashing When Using Fill & Sign

Natalie TaylorNatalie Taylor Nov 5, 2026 869 views

Question details

The user needs to resolve an issue where Adobe Acrobat Pro DC 2015 abruptly closes without an error message when attempting to use the Fill & Sign feature.

Fix Acrobat Pro DC 2015 Crashing When Using Fill & Sign
Product
Adobe Acrobat Pro DC 2015
Device & OS
Windows 10
Scenario
Attempting to add text or a signature to a PDF document using the Fill & Sign tool.
Observed behavior
The application crashes and closes silently without displaying any error codes, and standard troubleshooting like reinstalling or using the Cleaner Tool does not resolve the issue.
Before you start

Ensure you have saved all open documents to prevent data loss, and verify if you are running the latest available update for Adobe Acrobat 2015 before proceeding with system changes.

Solution 1Recommended

Disable Protected Mode and Enhanced Security Temporarily

Disabling these security features temporarily acts as a diagnostic step to determine if Acrobat's background security protocols are conflicting with the Fill & Sign tool.

Sometimes the Enhanced Security feature in Acrobat can conflict with system files or specific document structures on Windows 10, causing sudden silent crashes during interactive tasks like filling forms.

1
Open Preferences

Launch Adobe Acrobat Pro DC 2015 and navigate to Edit > Preferences from the top menu bar.

2
Navigate to Enhanced Security

In the left-hand pane of the Preferences window, scroll down and select the 'Security (Enhanced)' category.

3
Disable Protected Mode

Uncheck the box that says 'Enable Protected Mode at startup' and turn off 'Enhanced Security'.

4
Restart and Test

Click OK to save the changes, restart your computer, and try using the Fill & Sign tool again.

Disable Protected Mode and Enhanced Security Temporarily
Security Warning: Be sure to re-enable Protected Mode and Enhanced Security after testing, as leaving them disabled reduces your system's protection against malicious PDF files.
Seamless PDF Fill & Sign

Use WPS PDF to Fill & Sign Documents Without Crashing

Adobe Acrobat 2015 is an end-of-support product prone to unresolved crashing issues. Switch to WPS PDF Editor for a stable, robust environment to fill out forms and apply signatures effortlessly.

  1. 1. Install WPS Office: Download and install the free version of WPS Office from the official website.
  2. 2. Open Your Document: Launch WPS Office, select 'PDF', and open the document you need to sign.
  3. 3. Access Fill & Sign: Navigate to the 'Fill & Sign' tab located on the top navigation ribbon.
  4. 4. Apply Signature: Click 'Add Signature' to easily draw, type, or upload your digital signature securely.
Smoothly fill forms and add signatures without software crashesFully compatible with standard Adobe PDF formatsFree, lightweight PDF reader and editor with an intuitive interfaceRegularly updated and fully supported for modern Windows operating systems
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Frequently Asked Questions

Why does Acrobat 2015 close without displaying any error message?

Silent crashes typically occur due to conflicts with background security settings, outdated application versions, or corrupted user preference files. Disabling Protected Mode temporarily can help identify if security protocols are the root cause.

What does 'End of Support' mean for Adobe Acrobat 2015?

End of Support means the developer no longer provides technical support, bug fixes, or security updates for that specific version. This makes the software increasingly prone to unresolvable glitches, such as crashing during the Fill & Sign process on newer Windows updates.

How do I re-enable Protected Mode in Acrobat?

To turn the security features back on, go to Edit > Preferences > Security (Enhanced). Check the boxes for 'Enable Protected Mode at startup' and ensure Enhanced Security is turned on, then click OK and restart the application.

Are there free alternatives to safely sign PDF documents?

Yes, WPS Office offers a free, highly compatible built-in PDF Editor that includes stable and easy-to-use Fill & Sign features, making it an excellent alternative to outdated software.