The default PDF reader for Windows 10 is Microsoft Edge. Many users prefer using a version of the free Adobe Reader or Adobe Acrobat instead.
Here is how you can quickly change the default PDF application.
Right Click any PDF file on your desktop or in the file explorer.
Select "Open with"
Click "Choose another app" ( I realize you can see the app you want in the menu, but if you click that choice it will only work once).
Select the PDF reader you prefer
Click the "Always use this box to open .pdf files"
That's it. Let us know if you need further assistance by clicking the Slingshot Tech Support Button Below. Slingshot provides network support and helpdesk services to business.