Windows 11 · 26H2 · .NET Framework update

.NET Framework Preview Update for Windows 11 - KB5125105 (26300.10003)

Windows 11 26H2: Not yet released — Insider flights only

This is a .NET Framework package for Windows 11 26H2, not an operating-system build. Its history below lists other .NET packages on the 26300 base.

Download amd64 — build 26300.10003 from UUP Dump, opens in a new tab All 26H2 builds JSON — this build from the builds API

AI summary

This Insider Preview delivers experimental .NET Framework reliability and compatibility improvements for Windows 11, without introducing new user-facing features or significant UI changes.

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 26300.10003 or KB5125105 and describe a fault appear here automatically.

In the news

No article names 26300.10003 or KB5125105 yet, and nothing about Windows 11 26H2 was published in its release window. Browse Windows news.

Discussed on the forum

No member thread names 26300.10003 yet.

Search the forum for 26300.10003 Ask about this build