1. Click the search bar on the bottom left of your screen. 

2. Type in Printers and Scanners, then press Enter. 

3. Scroll down to the Printer Preferences section, and locate where it says Let Windows manage my default printer.  See the picture below:

4. Uncheck the box below:

5. Scroll up and select the printer you want as your default printer.

6. Click Set as Default.