In Windows 10, you need to open up the Printers & Scanners window to set one of your already installed printers as the default printer.
- Click on the Windows icon on your taskbar.
- Search for Printers & Scanners by typing in Printers & Scanners
- Click on the printer you want to set as the default, and click on ‘Manage’
- Click on the option to ‘Set as Default’
- All done, You can close down the window and try to print. Your default printer should automatically be chosen.