Microsoft's timing is awkward, as it continues to encourage Windows 10 users to upgrade now that official support has ended.

Microsoft’s latest Windows 11 patch tripped over its own shoelaces and knocked out localhost, leaving devs unable to reach web apps running on their own machines. The October cumulative update ...

Windows updates usually bring security enhancements, bug fixes and new features. Sometimes, though, these updates can also break parts of the operating system. Unfortunately, some updates for ...

In environments where the cumulative update for Windows 11 released by Microsoft in October 2025 (KB5066835) has been applied, an issue has occurred where localhost is no longer accessible. This has ...

If you encounter the Localhost refused to connect error message when running any web server on your local Windows 11/10 computer, then this post is intended to help ...

Microsoft has fixed a known issue breaking HTTP/2 localhost (127.0.0.1) connections and IIS websites after installing recent Windows security updates. This bug affects both Windows 11 and Windows ...

Update 10/17/25: Microsoft fixes the bug using a KIR (Known Issue Rollback) update. More information added to end of story. Microsoft's October Windows 11 updates have broken the "localhost" ...

Support for Windows 10 has just ended, and what welcomed thousands of new Windows 11 users? A broken update of course.

After installing the update previews from late September or the security updates from October in Windows, some unexpected side effects may occur. Microsoft reports failed authentication with smart ...

Microsoft has since indicated that a fix is on the way in a subsequent update for issues with Windows 11 KB5066835. The company says a patch is rolling out and users should continually check for an ...

Windows 11 gathers more information than some people would like. Here are steps you can take to keep that information private. A critical October patch has disrupted many development environments in ...