How to Set Default PDF Viewer On Windows OS and Edge

The following example sets Adobe Reader as the default PDF viewer.
 
To set the default PDF viewer from a file

• Open File Explorer
• Locate and right click on a PDF file
• Select Properties

Under type of file, you can view which application this file will open with. You can change this and set a default by selecting change, then the application, followed by "set default".

To set the default PDF viewer from Windows Settings

• Click on the windows Icon and choose Settings (gear icon) - OR - on your keyboard press the windows key + i to open settings

• Choose Apps on the left pane
• Choose Default apps on the right

• Type pdf and select .pdf from the drop down

• You will be shown the default application for pdf files currently. You can select this, and a different application to change the default

If you don't want a downloaded PDF to open in Edge browser after downloading it, see below to apply settings to open system default viewer:

• Open Edge Browser: click on dots (...) in the upper right > Choose download > right-click on a PDF that is visible and select 'Always Open with System Viewer'.
• If a PDF file is not visible, attempt to download one as a test, then right-click and choose the 'Always open with system viewer' option.

You can set the specific application you desire to open PDF files on the computer or from downloads of the Edge browser.