Windows 11 26H2 build 26300.7877 — release notes, downloads, known issues

Windows 11 Insider Preview Feature Update (26300.7877)

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

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Coverage Windows 11 Dev Channel 26300.7877 Update: Subtle UX Polish and Paint Freeform Rotate Feb 20, 2026 · names this build
Fix Windows 11 Insider Builds 26300 7877 Dev and 26220 7872 Beta: UI Polish and Fixes Feb 20, 2026 · Windows 11 26H2 coverage from this build's release window
Coverage Windows 11 26H2 AI Copilot Expands to Taskbar Explorer Run Feb 24, 2026 · Windows 11 26H2 coverage from this build's release window
Coverage Windows 11 Settings Gains Account Rename Preview (Dev Build 26300 7877) Feb 24, 2026 · Windows 11 26H2 coverage from this build's release window
Coverage Windows 11 26H2 Enablement: Copilot on Taskbar and File Explorer Feb 25, 2026 · Windows 11 26H2 coverage from this build's release window
Coverage Windows 11 26H2 Enablement: Copilot in Taskbar and Explorer with Sysmon Feb 26, 2026 · Windows 11 26H2 coverage from this build's release window
Coverage Windows 11 Dev Channel 26300.7939: Batch File Locking, LE Audio Preview, Narrator Command Feb 27, 2026 · Windows 11 26H2 coverage from this build's release window
Coverage No Windows 12 in 2026: Windows 11 updates continue with 25H2 26H1 26H2 Mar 4, 2026 · Windows 11 26H2 coverage from this build's release window

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