Build 26100.994: Windows Insider Release Preview Channel, June 2024. WDAC policy checks and Task View animation stutters addressed

Release Preview Insiders on Windows 11 version 24H2 get fixes for WDAC policy checks, DWM responsiveness, UWF restart calls, and animation stutters, plus updated mobile-operator profiles.

Does it affect you? Applies to: Devices running Windows 11, version 24H2, enrolled in the Release Preview Channel.

This is a test build for people in the Windows Insider Program. Features in it can change, be removed, or never reach regular Windows releases.

What changes

Fixes 5 changes

Windows Defender Application Control (WDAC)

2 items

For: everyone in the Release Preview Channel

Windows correctly verifies policies for some apps that it previously failed to verify.¹
Addresses a WDAC issue that prevents verification of some app policies.
A certain class of WDAC policies is no longer incorrectly reported as inactive or unauthorized.²
Addresses incorrect status reporting for a certain class of WDAC policies.

DWM.exe

For: everyone in the Release Preview Channel

An issue that might cause the desktop window manager to stop responding is addressed.³
Addresses an issue that might cause DWM.exe to stop responding.

Unified Write Filter (UWF)

WMI requests to shut down or restart a system no longer fail with an access-denied exception when Unified Write Filter is involved.⁴
Addresses an issue where Windows Management Instrumentation (WMI) API calls to shut down or restart a system throw an access-denied exception.

Animations

For: Insiders noticing animation stutters

Some animation stutters, particularly in Task View, are addressed.⁵
Addresses an issue believed to be the underlying cause of some Insiders noticing dropped frames in animations, particularly with Task View.

Improvement 1 change

Country and Operator Settings Asset (COSA)

Profiles for certain mobile operators are brought up to date.⁶
Updates Country and Operator Settings Asset (COSA) profiles for certain mobile operators.

Technical details

Data sheet · Security · Downloads · Components Click to collapse or expand

Data sheet

Released: 2024-06-20
Type: Windows Insider build

Version	Build	Channel
24H2	26100.994	Release Preview Channel

Security

No vulnerabilities are listed for this update.

Sources

Windows Insider Blog

Updated Oct 27, 2026

Cited passages from Microsoft's official notes (6)

1. This update addresses an issue that affects Windows Defender Application Control (WDAC). It fails to verify the policies of some apps. blogs.windows.com
2. This update addresses an issue that affects WDAC. It reports a certain class of its policies as not active or not authorized. blogs.windows.com
3. This update addresses an issue that might cause DWM.exe to stop responding. blogs.windows.com
4. This update addresses an issue that affects Unified Write Filter (UWF). Windows Management Instrumentation (WMI) API calls to shut down or restart a system throws an access denied exception. blogs.windows.com
5. This update addresses an issue believed to be the underlying cause of some Insiders noticing stutters in some animations recently (dropping frames), particularly with Task View. blogs.windows.com
6. This update brings Country and Operator Settings Asset (COSA) profiles up to date for certain mobile operators. blogs.windows.com

Checked automatically: 8 of 8 checks passed, 6 quoted passages

Quotes found in the official pages: passed
Numbers found in the sources: passed
Vulnerabilities from the dossier only: passed
Links to allowed domains only: passed
Every official change covered: passed
Readable plain text: passed
Changes confirmed by the file list: passed
Sources agree: passed

A second AI read the text against the sources: correctness 5/5, clarity 4/5, completeness 5/5. How we work

Published by The Update Bureau. Written with AI from Microsoft's own documents, checked by rules and a second AI. How we work · Report a mistake