Microsoft has officially broken localhost with their latest Windows 11 October 2025 update. After installing the new update, anything that uses localhost or 127.0.0.1 completely stopped working. Developers all over are reporting that their web servers, dashboards, and apps that depend on local connections can’t even start anymore. Browsers throw errors like connection reset or HTTP/2 protocol error, and nothing loads. Once again, Microsoft somehow managed to break one of the most basic and essential parts of Windows. Localhost has existed for decades it’s what almost every developer relies on to test and debug their work. Yet this update just killed it overnight. Microsoft claims they’re “looking into it,” but for now, local servers on Windows 11 are completely unusable. This is exactly why I’m staying on Windows 10 LTSC forever. It’s stable, lightweight, has no forced online account nonsense, and doesn’t break core system functions every month. Windows 11 just keeps getting worse