Other PDF Issues

How to Fix Acrobat Crashing When Setting PDF Encryption Passwords

Khadija KhanKhadija Khan Oct 28, 2026 869 views

Question details

The user needs to apply a document-open password to encrypt a PDF but experiences application crashes.

How to Fix Acrobat Crashing When Setting PDF Encryption Passwords
Product
Adobe Acrobat DC
Device & OS
Windows 10 Pro 64-bit
Scenario
Trying to protect a PDF document with a password using the Protect tool accessed from the main Tools menu.
Observed behavior
The Adobe Acrobat DC application crashes consistently every time the user attempts to set a document-open password from the Tools menu.
Before you start

Ensure your Adobe Acrobat DC is updated to the latest version, as software patches often resolve unexpected crashes. Additionally, check that your PDF file is not already restricted or corrupted by trying to open it in another basic viewer.

Solution 1Recommended

Use the Right-Side Protect Pane Workaround

Bypass the main Tools menu and use the right-hand panel option to apply PDF encryption without triggering the software crash.

In certain versions of Acrobat DC, a UI glitch causes the application to crash when the Protect tool is launched directly from the top Tools menu. Initiating the same function from the right-side toolbar often avoids this bug entirely.

1
Open your document

Launch Adobe Acrobat DC and open the PDF file you wish to encrypt.

2
Locate the right-side pane

Instead of clicking the 'Tools' tab at the top left of the window, look at the vertical toolbar on the right side of your screen.

3
Select the Protect tool

Click on the 'Protect' shield icon located in the right-side pane.

4
Apply encryption

In the new bar that appears at the top, click 'Encrypt' and select 'Encrypt with Password'. Enter your document-open password, confirm it, and save the file.

Use the Right-Side Protect Pane Workaround
Quick Fix: Applying the encryption from the right side successfully prevents the crash for most users experiencing this specific Acrobat glitch.
Encrypt PDFs Seamlessly

Password Protect PDFs Easily with WPS Office

If Adobe Acrobat continues to crash and disrupt your workflow, use WPS Office to quickly and securely encrypt your PDF files. WPS Office provides a stable, built-in PDF editor that handles document-open passwords and permissions without performance issues.

  1. 1. Open your PDF: Launch WPS Office and open the PDF file you want to password-protect.
  2. 2. Go to the Protect tab: Navigate to the 'Protect' tab located on the top ribbon of the PDF interface.
  3. 3. Open encryption settings: Click on the 'Encrypt' button to bring up the password security dialog box.
  4. 4. Set your password: Check the box for 'Set Open Password', type in your secure password, and click 'Confirm'.
  5. 5. Save the file: Press Ctrl + S or go to Menu > Save to apply and finalize the encryption.
Stable, crash-free PDF encryption and advanced editing capabilities.Fully compatible with standard PDF formats and Adobe Acrobat files.Lightweight application that consumes significantly fewer system resources.All-in-one office suite for managing PDF, Word, Excel, and PowerPoint documents.
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Frequently Asked Questions

Why does Adobe Acrobat crash only when using the Tools menu?

Software bugs or corrupted UI components in specific versions of Acrobat DC can cause crashes when triggering tools from certain menus. Using alternative entry points, like the right-side pane, often bypasses the corrupted trigger.

Does repairing Adobe Acrobat always fix the crashing issue?

Not always. While repairing the installation fixes missing or corrupted core files, it may not resolve version-specific bugs. If the repair fails, using a UI workaround or an alternative PDF editor like WPS Office is highly recommended.

Are PDFs encrypted in WPS Office compatible with Adobe Acrobat?

Yes, WPS Office uses standard PDF encryption protocols. A PDF password-protected in WPS Office can be opened and viewed in Adobe Acrobat or any other standard PDF reader, provided the user enters the correct password.

What is the difference between a document-open password and a permissions password?

A document-open password prevents users from opening and viewing the PDF entirely without the password. A permissions password allows anyone to open the file but restricts specific actions like editing, printing, or copying text.