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File Format & Compatibility

How to Stop PDFs from Opening in Word and Restore Default Associations

Guest WriterGuest Writer Oct 1, 2026 868 views

Question details

User needs to change the default application for PDF files back to a dedicated PDF reader after accidentally setting Microsoft Word to always open them.

How to Stop PDFs from Opening in Word and Restore Default Associations
Product
Windows
Device & OS
Windows 10 / Windows 11
Scenario
The user selected Microsoft Word to 'Always' open PDF files, changing the default file association at the system level.
Observed behavior
PDF files automatically open in Microsoft Word instead of a PDF viewer and undergo a temporary document conversion process.
Before you start

Ensure you have a dedicated PDF reader installed on your computer, such as WPS Office or Adobe Acrobat, before changing your default file associations.

Solution 1Recommended

Change Default App via File Explorer

The quickest way to restore your PDF file association is directly from a PDF file using the Windows right-click menu.

This method updates your Windows registry to immediately recognize your chosen software as the primary handler for all .pdf documents.

1
Locate a PDF file

Open File Explorer and navigate to any folder containing a PDF document.

2
Access the Open with menu

Right-click the PDF file, hover over 'Open with' in the context menu, and select 'Choose another app'.

3
Select a PDF reader

Choose your preferred PDF reader (like WPS Office) from the list of available applications.

4
Set as default

Check the box that says 'Always use this app to open .pdf files' and click 'OK'. Your PDFs will now open in the correct application by default.

Change Default App via File Explorer
Powerful PDF Editor

Easily Manage and Edit PDFs with WPS Office

WPS Office includes a robust, built-in PDF reader and editor. You can easily set WPS Office as your default PDF viewer to enjoy fast reading, seamless annotation, and native PDF editing without unwanted conversions.

  1. 1. Download the software: Download and install WPS Office from the official website.
  2. 2. Access File Associations: Open WPS Office, click on the 'Global Settings' icon (gear shape) in the top right corner, and select 'Settings'.
  3. 3. Set as Default: Navigate to the 'File Associations' tab and check the box to set WPS Office as your default PDF application.
Set as your default PDF reader for instant, accurate document viewing.Fully compatible with Microsoft Office formats and standard PDF files.Easily edit text, add annotations, and merge or split PDF files.Lightweight software that provides a seamless Office alternative without slowing down your computer.
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Frequently Asked Questions

Did opening my PDF in Word permanently change the file?

No, changing the default application to Word does not alter the original PDF file itself. Word only performs a temporary conversion for editing purposes. The original file remains unchanged unless you explicitly save over it.

Why does Word try to convert the PDF when opening it?

PDF is not a native Microsoft Word format. To display the content and allow you to edit it, Word must interpret the PDF elements and temporarily convert them into editable Word elements.

How do I stop Windows from constantly asking me which app to use for PDFs?

To stop the repeated prompts, right-click any PDF file, select 'Open with', choose 'Choose another app', select your desired PDF reader, and ensure you check the box labeled 'Always use this app to open .pdf files' before clicking OK.