If you previously used a USB printer, sharing it with everyone over your network was pretty easy. All you had to do was go to the Share tab in the printer's properties and share it with everyone. The share tab is gone in Windows 10 and how you share a USB printer in Windows 10 has changed.
To find the share option for sharing a USB printer over your network in Windows 10, open the Control Panel app and go to Devices & Printers. Right-click the printer you want to share and select 'See what;s printing' from the context menu. This opens the printer's jobs' window where you can see all active and queued print jobs. Open the 'Printer' menu and select 'Sharing'. Go to the 'Share' tab and enable the 'Share this printer' option. You can enter a different name for the printer if you'd like. Click 'Apply' and everyone on your network should now be able to send print jobs to the printer you just shared.