When you do not configure the printer sharing group policy while working in a sandboxed environment, all host printers are shared into Windows Sandbox by default. You can change this setting following ...

Run the Printer Troubleshooter. Temporarily disable Windows Firewall or any other Security Software. Uninstall and Reinstall the printer driver in Compatibility mode. Check if Network Discovery and ...

Well for some reason I could print just fine from my Vista machine while the printer was on an XP machine, despite there being no drivers for Vista.