Mixed-generation sharing worked for years, so the errors feel unfair when they arrive. They are not random breakage - Windows quietly changed the sharing rules, one update at a time, and the old setup did not change with them.
An office print host lives a long time, so plenty of networks still pair a Windows 7-era host with brand-new Windows 11 clients. For years that mix simply worked. Then the errors started arriving 'after an update', usually on one side only. The cause is protocol drift: Microsoft removed HomeGroup, switched off the old SMB1 protocol by default, blocked guest access, and hardened printer sharing after the PrintNightmare attacks - while the old host still speaks the old language. This guide names each change, what it breaks, and the honest ways forward.
Example summary. None of these changes announced themselves at the printer - each one quietly invalidated a piece of the old setup.
HomeGroup was removed from Windows 10 in 2018. Any old guide, printed note or forum answer that begins with 'create a homegroup' or 'enter the homegroup password' cannot work on a current PC, and following it wastes the whole afternoon. Its replacement is ordinary sharing done properly: accounts with passwords on the host, discovery and file and printer sharing on, and password protected sharing left on.
Very old systems share files and printers using SMB1, a protocol modern Windows ships switched off - deliberately, because SMB1 has known, exploited weaknesses that were used by the WannaCry attacks. Turning the SMB1 client back on, on a new PC, can reach an ancient host again, but treat that strictly as a short bridge while you move the printer, never as the finished fix - and never enable the SMB1 server on a modern PC to make the old one happy.
The 2021 printer security hardening changed what a patched Windows expects from the PC on the other end. A fully updated client and a long-unpatched host (or the reverse) can refuse each other with connection errors even when every sharing setting looks right - the error 0x0000011b that appears after updates is exactly this pairing problem. The lesson is dull and real: keeping both sides fully updated is now part of printer sharing, not a separate chore.
See the current, supported way to share a printer - the method that survives updates on both sides.
▶️ Watch Full VideoUpdate both sides fully first. Most mixed-version breaks are patch or protocol drift between the two ends, and once both are current the same share usually connects again without any setting changes.
It can still share a printer, but it is unsupported, receives no security fixes, and speaks the sharing protocols modern Windows is retiring. Plan its replacement as print host even if it keeps working for now.
Only as a short-term bridge on the client side while you move the printer to a supported host or a network connection. SMB1 has known weaknesses that were exploited at scale, so leaving it on permanently trades a printer problem for a security one.