**Microsoft** has confirmed that certain users are experiencing desktop loading issues, including persistent black screens, after installing the August 2026 preview updates and subsequent releases. While affecting a subset of the user base, the company notes that the problem is most prevalent on **Azure Virtual Desktop (AVD)** hosts utilizing **FSLogix**, a software solution designed to accelerate user profile loading in virtual desktop environments. ### Symptoms and Affected Updates Users encountering this known issue may face several symptoms, most notably a black screen post-sign-in, preventing access to the desktop until the session is manually initiated. Application event logs often show **Windows Explorer** crashes. The specific updates linked to these issues include **KB5120996** (Windows 11 26H1), **KB5120998** (Windows 11 24H2/25H2), and this month's **Patch Tuesday** updates, **KB5124008** and **KB5122880**. ### Immediate Workarounds for Individual Users Until a permanent patch is released, affected users can temporarily resolve the issue by manually launching **Windows Explorer**. This can be done by: 1. Opening **Task Manager** (Ctrl+Shift+Esc). 2. Selecting **Run new task**. 3. Entering `explorer.exe`. 4. Clicking **OK**. ### Enterprise Mitigation via Known Issue Rollback (KIR) **Microsoft** has also deployed a mitigation for enterprise customers through **Known Issue Rollback (KIR)**, a Windows feature designed to reverse problematic updates delivered via **Windows Update**. IT administrators can apply this mitigation on enterprise-managed devices by installing one of the following group policies: * **Windows 11, version 26H1**: [KB5124006 Known Issue Rollback](https://download.microsoft.com/download/09efb4c6-54f4-4e63-83c7-4314187230bf/Windows%2011%2026H1%20KB5124006%20260924_20071%20Known%20Issue%20Rollback.msi) * **Windows 11, version 25H2 and Windows 11, version 24H2**: [KB5124010 Known Issue Rollback](https://download.microsoft.com/download/8c71622d-e0eb-4838-b25c-ddb99a7bf971/Windows%2011%2024H2,%20Windows%2011%2025H2%20and%20Windows%20Server%202025%20KB5124010%20260924_20021%20Known%20Issue%20Rollback.msi) **Microsoft** advises, "You will need to install and configure the Group Policy for your version of Windows to resolve this issue. You will also need to restart your device(s) to apply the group policy setting." The company further clarified that this Group Policy will disable the problematic change until a permanent resolution is included in a future Windows update. Administrators can find comprehensive guidance on deploying and configuring **KIR** group policies on **Microsoft's** official support website. ### Recent Bug Resolutions This incident follows earlier resolutions this month where **Microsoft** addressed issues that reset mouse and desktop settings on some **Windows 11** systems, also triggered by the **KB5120998** August 2026 optional update.