Windows 11 / Intelligence workspace
Snapshot · 2026-10-25
IssuesKB5065789Evidence
Windows update intelligence

IIS websites may fail to load

Server-side applications relying on HTTP.sys may experience issues with incoming connections, and IIS websites may fail to load.

ResolvedC3 · Microsoft confirmedMajor impactSnapshot checked 2026-10-25

Does this match your environment?

Windows scope
24H2 / 25H2
Architecture
Unknown — not universal
App / driver
IIS / HTTP.sys
Conditions
IIS deployments relying on HTTP.sys after the September 2025 preview; other web servers are not stated as affected.

A matching version is only a starting point. This page does not diagnose an individual device.

Evidence & current resolution

Microsoft lists this scope as resolved on 2025-10-28. Resolving update: KB5067036.

Microsoft official evidence
Evidence ID
official-iis-httpsys-fail
Source groups
1 · official publication
Evidence basis
Manually reviewed public source; no independent device test
Evidence permalink

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Recorded timeline

2025-09-29

Originating update released

KB5065789
2025-10-28

Official resolution recorded

KB5067036

2026-10-25

Snapshot reviewed

Added to this curated collection. Earlier acknowledgement time was not independently captured.

Follow official guidance for your environment. We do not provide automatic rollback or security-disable actions.