Windows 10 · 21H2 · Release · Out-of-band update

Feature update to Windows 10, version 21H2 (19044.7811)

Windows 10 21H2: Servicing ended

Microsoft release information · Verified Oct 26, 2026

Download amd64 — build 19044.7811 from UUP Dump, opens in a new tab Download arm64 — build 19044.7811 from UUP Dump, opens in a new tab Download x86 — build 19044.7811 from UUP Dump, opens in a new tab All 21H2 builds JSON — this build from the builds API

AI summary

Windows 10 version 21H2, build 19044.7811, is a Release-channel build included in the October 26, 2026 out-of-band update KB5134125. The documented change is an updated trusted-root certificate payload for devices that can’t access Microsoft’s certificate-update service or have automatic certificate-list updates disabled. (support.microsoft.com)

Generated from the package's release notes and forum coverage. Verify against Microsoft's release-health page before acting on it.

Known issues — reported on the forum

No problems reported on the forum for this build yet. Threads that name 19044.7811 or KB5134125 and describe a fault appear here automatically.

In the news

No article names 19044.7811 or KB5134125 yet, and nothing about Windows 10 21H2 was published in its release window. Browse Windows news.

Discussed on the forum

No member thread names 19044.7811 yet.

Search the forum for 19044.7811 Ask about this build