ComputingSoftware

Windows 11 Update Disrupts Developer Workflows with Localhost Connectivity Issues

A recent Windows 11 cumulative update has reportedly severed localhost connectivity, leaving developers unable to access applications running on their own machines. The issue appears to stem from HTTP.sys component changes affecting HTTP/2 protocol handling. Temporary workarounds exist but Microsoft has yet to officially acknowledge the problem according to user reports.

Windows 11 Update Cripples Local Development Environments

A recent Microsoft cumulative update for Windows 11 has reportedly broken localhost functionality, creating significant disruptions for developers working on web applications, according to multiple technical forums and user reports. The October 2025 update (KB5066835) appears to have severed the operating system’s ability to communicate with itself, preventing developers from accessing applications running on their local machines.