Windows 10 · 21H1 · Release · Security update (Patch Tuesday)

Feature update to Windows 10, version 21H1 (19043.1826)

Windows 10 21H1: Servicing ended

Download amd64 — build 19043.1826 from UUP Dump, opens in a new tab Download arm64 — build 19043.1826 from UUP Dump, opens in a new tab Download x86 — build 19043.1826 from UUP Dump, opens in a new tab All 21H1 builds JSON — this build from the builds API

AI summary

Writing the summary for this build…

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 19043.1826 or KB5015807 and describe a fault appear here automatically.

In the news

No article names 19043.1826 or KB5015807 yet, and nothing about Windows 10 21H1 was published in its release window. Browse Windows news.

Discussed on the forum

No member thread names 19043.1826 yet.

Search the forum for 19043.1826 Ask about this build