Other PDF Issues

How to Set Acrobat X as Default PDF Handler with Acrobat DC Installed

John WilsonJohn Wilson Nov 2, 2026 869 views

Question details

The user needs to configure Adobe Acrobat X as the primary PDF handler on a computer where Adobe Acrobat DC is also installed.

How to Set Acrobat X as the Default PDF Handler When Acrobat DC is Installed
Product
Adobe Acrobat
Device & OS
Windows
Scenario
Managing file associations when multiple versions of a PDF application are installed on the same system.
Observed behavior
Windows file-association settings and Acrobat's internal default-program controls may conflict, causing Acrobat DC to repeatedly override Acrobat X as the default handler.
Before you start

Ensure you are logged into your Windows computer with an administrator account, as modifying default application settings and file associations requires administrative privileges.

Solution 1Recommended

Change Default PDF Application via Windows Settings

The most reliable method to force Windows to use Acrobat X instead of Acrobat DC is by manually assigning the file extension in the Windows Default Apps menu.

Windows 10 and Windows 11 manage default programs centrally. Assigning the default program by file type prevents other versions from passively hijacking the association.

1
Open Windows Settings

Press the Windows key + I on your keyboard to open the Windows Settings menu.

2
Navigate to Default Apps

Click on 'Apps' from the main menu, and then select 'Default apps' from the left-hand navigation pane.

3
Choose default apps by file type

Scroll down to the bottom of the Default apps page and click on the 'Choose default apps by file type' link.

4
Locate the .pdf extension

Scroll down the alphabetical list until you find the '.pdf' file extension.

5
Set Acrobat X as Default

Click on the current default app (which is likely showing Acrobat DC or Microsoft Edge) and select Adobe Acrobat X from the pop-up list of available applications.

Change Default PDF Application via Windows Settings
Verification: Once selected, the icon next to '.pdf' will change to the Acrobat X icon, confirming the setting has been saved.
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Frequently Asked Questions

Why does Acrobat DC keep overriding Acrobat X as the default PDF app?

Acrobat DC often includes background update services that regularly check and re-assert itself as the default PDF handler. This can cause Windows to revert your preferred settings for Acrobat X back to DC after an application update or a system reboot.

Is it safe to have Acrobat X and Acrobat DC installed at the same time?

While you can technically install both versions on the same Windows machine, it is generally advised against. They share specific registry keys and system resources, which frequently leads to application crashes, plugin errors, and persistent file association conflicts.

How do I fix missing PDF thumbnails after changing the default app?

If PDF thumbnail icons disappear in Windows Explorer after switching your default handler to Acrobat X, open Acrobat X, navigate to Edit > Preferences > General, and ensure the 'Enable PDF thumbnail previews in Windows Explorer' option is checked. You may need to restart your computer for the change to take effect.

Can I set WPS Office as my default PDF reader instead?

Yes. If you install WPS Office, you can set it as your default PDF application through the Windows Default Apps settings or by checking the 'Set as default PDF reader' option during the installation process. It provides a stable reading experience without the conflicts typical of multiple Adobe installations.