Windows 11 Insider Beta Preview Build 26220.8690

Release date: 19 June 2026

Changes and improvements

This update addresses an issue that could result in bugchecks citing HYPERVISOR_ERROR (0x20001) and KMODE_EXCEPTION_NOT_HANDLED (0x1E) errors after installing the latest flights on some devices during system restarts, virtual machine operations, or while running some gaming applications.

Improved reliability of Start menu reflecting newly installed or removed apps without requiring sign-out or restart.

Updates are based on Windows 11, version 25H2 via an enablement package (Build 26220.8690).
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Features and experiences included in these builds may never get released as we try out different concepts and get feedback. Features may change over time, be removed, or replaced and never get released beyond Windows Insiders. Some of these features and experiences could show up in future Windows releases when they're ready.
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