How do I set my HP DeskJet 3630 as the default printer on Windows?

The process varies by Windows version. For Windows 8.1/8, go to Settings > Control Panel > View devices and printers. For Windows 7, go to Devices and Printers. For Windows Vista/XP, go to Control Panel > Printer/Printers and Faxes. Right-click the printer icon and choose 'Set as Default Printer' to ensure it has a check mark next to it.