Windows 11 · 25H2 · .NET Framework update
.NET Framework Security Update for Windows 11 - KB5100998 (26200.9340)
- Release
- .NET Framework update
- KB5100998 — Microsoft's article, opens in a new tab
- amd64
- arm64
Windows 11 25H2: Current mainstream release
This is a .NET Framework package for Windows 11 25H2, not an operating-system build. Its history below lists other .NET packages on the 26200 base.
AI summary
KB5100998 (Build 26200.9340) delivers .NET Framework runtime reliability improvements, Windows 11 compatibility fixes, and security patches addressing known vulnerabilities.
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 26200.9340 or KB5100998 and describe a fault appear here automatically.
In the news
- Coverage KB5101684 Updates Windows 11 to Builds 26100.8968 and 26200.8968
- Coverage Windows 11 24H2 Support Ends October 13, 2026: Upgrade to 25H2
- Coverage Windows 11 26100.8942/26200.8942 Improve Search and Explorer
- Coverage Windows 11 Builds 26100.8942/26200.8942 Add Voice Isolation
- Coverage Windows 11 25H2: Canary-Test WSL2 VM Creation Before Rollout
- Coverage Windows 11 23H2: Move Enterprise Fleets to 25H2 Before November 10, 2026
- Coverage Windows 11 25H2: ODU Opens Early Upgrades Before October Rollout
- Coverage Windows 11 25H2 ISOs Top 8GB as Copilot+ AI Models Add 3GB
Discussed on the forum
No member thread names 26200.9340 yet.