Issue database
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Issues & evidence
21 resultsBlack screen after sign-in on virtual desktop hosts
After the August 2026 preview and subsequent updates, some users saw a black screen after sign-in with the desktop session failing to load; Explorer crashes appear in application event logs.
Applications requiring AC-3 audio decoding may close unexpectedly
Legacy applications that decode AC-3 audio may close unexpectedly after the September 2026 preview.
Remote Desktop Services may become unresponsive
Some environments experienced failed RDP connections or unresponsive management tools after the September 2026 security update.
Plan9 host folders unavailable in Linux VMs
Host folders may be inaccessible in HCS-managed Linux VMs using Plan9.
Domain-joined devices may lose their secure trust relationship
Some Credential Guard protected machine accounts lost their secure channel with on-premises AD domains, blocking interactive sign-in with valid credentials.
Teams and Outlook launch failures on ARM
Some ARM-based PCs cannot launch Teams or Outlook after the August update.
Custom mouse pointers revert unexpectedly
Customized pointers can revert on non-English Windows installations.
Desktop background resets to a solid color
Some installations lose their selected desktop background.
Games hang when certain RGB drivers are present
Some games become unresponsive with certain RGB peripheral drivers.
Poor performance on some Dell devices with an Intel driver
Specific Dell models running the Intel Innovation Platform Framework Processor Participant driver may experience poor performance.
Recycle Bin dialog shows an internal filename
Deleting a file from the Recycle Bin displays an internal filename in the confirmation dialog.
May 2026 security update fails to install with 0x800f0922
Some devices failed to install the May 2026 security update due to insufficient free space on the EFI System Partition.
Microsoft account sign-ins may fail in Teams Free and other apps
Sign-ins using consumer Microsoft accounts may fail in Microsoft Teams Free and other applications.
WUSA updates may fail when installed from a shared folder
Updates installed via WUSA may fail when installed from a network folder containing multiple .msu files.
Credential prompt failures on Azure Virtual Desktop and Windows 365
The January 2026 update caused Windows App credential prompt failures on Azure Virtual Desktop and Windows 365.
Apps become unresponsive saving to cloud-backed storage
Applications including Outlook could become unresponsive when saving files to cloud-backed storage, such as PST files stored on OneDrive.
Task Manager keeps running in the background after closing
Task Manager processes may continue running after the app is closed; multiple lingering instances may impact overall performance.
IIS websites may fail to load
Server-side applications relying on HTTP.sys may experience issues with incoming connections, and IIS websites may fail to load.
Protected content may fail to play in BluRay/DVD and TV applications
Some applications are unable to display or record live TV or play DRM-protected content.
USB mouse and keyboard unresponsive in Windows Recovery Environment
USB mice and keyboards may not work inside the Windows Recovery Environment after the October 2025 security update.
Smartcard authentication issues after the October 2025 update
A security change strengthening Windows Cryptographic Services caused smartcard authentication issues for some configurations.