Some devs and IT teams started noticing their internal apps suddenly stopped connecting. But the real cause? 👇
See more 👇
🐞 Windows 11 updates (KB5066835 & KB5065789) broke “localhost” HTTP/2 connections — triggering ERR_CONNECTION_RESET errors and disrupting tools like:
💻 Visual Studio
🧩 SSMS Entra ID authentication
🛡️ Duo Desktop
⚙️ Even minor updates can ripple through environments — halting productivity, testing, and authentication. It’s a good reminder that patch management = risk management.
✅ Microsoft has released a fix restoring localhost functionality.
📰 Stay informed 👇
🔗 What broke:
https://lnkd.in/ep_z6An3
🔗 The fix:
https://lnkd.in/eiR7qKPr
Did Microsoft just break “localhost”?
ByZP Enterprises Webmin
Oct 20, 2025