1. Click on the Start button and select the Settings icon. 2. In the Windows Settings display, select Apps 3. Within the App list, select Default apps. At the bottom of the default apps page, select Set defaults by app The Set Default Programs window will open 4. Under the list of programs on the left, click on Adobe Acrobat DC 5. Choose Manage, select PDF, Choose a Default 6. Select OK The next time you open a pdf it will automatically open in Adobe Reader