PDF Documents: Set Adobe as Default
To change the default PDF reader, you will need to perform the following steps:
1. Right click any PDF file that you have saved to either your Downloads, Desktop, or Documents folders. Select Properties from the menu
2. Click the Change button next to Opens with:
3. Select Adobe Acrobat Reader DC from the list of programs (or another program if you prefer)
4. Click OK to apply the settings change
5. Click OK to apply and close the PDF file properties window
You're default PDF reader is now set to Adobe Acrobat Reader (or other program of your choice.)