Black Screen | Browsers keep on crashing in Windows 11 - Azure VDI |

Question

Black Screen | Browsers keep on crashing in Windows 11 - Azure VDI |

Manoj Chauhan 65

Hi Team,

Users are facing intermittent issues after we migrated to Windows 11 Multi Session OS (Pooled Model) in our Azure Virtual Desktop.

Black screen
All Browsers Restarting automatically. Tried clearing browser cache temp files, prefetch, user profile folders but no luck. Also checked the windows update option, no pending system updates. Its annoying and causing productivity issues. can you please help ? Regards, Manoj.

Manoj Chauhan 65 Reputation points

2025-11-23T12:23:15.29+00:00
Are there any specific error messages displayed when the black screen occurs or when browsers crash? Ans : No Error Messages, just the browsers crash.

How often do the browsers crash, and which browsers are primarily affected (Edge, Chrome, Firefox, etc.)? Ans : intermittent, but when it happens all the browsers are affected.

Have there been any recent changes or updates to the VDI environment, session hosts, or user profiles before these issues started? Ans : No

Are the users experiencing issues isolated to specific applications or accessing unique resources compared to unaffected users? Ans : Its like when someone is affected, they face the issue and if they don't noting happens.

When does the black screen occur—immediately upon login, intermittently during sessions, or after performing specific actions? Ans : Upon Login, no response, just black screen.

Are all users impacted or only a subset? Similarly, are all session hosts exhibiting this problem or only certain hosts? Ans : When the issue occurs, multiple session hosts are affected.

Are FSLogix or other profile management services in use, and have profile recreations or cleanups been attempted to rule out profile corruption? Ans : Yes, FsLogix is used. cleanups have not been attempted. Would need guidance

What version/build of Windows 11 multi-session is running on the hosts, and are all relevant updates, patches, and drivers installed? Ans : Windows 11 Enterprise Multisession 23H2

Have users or administrators attempted any workarounds such as disabling the AppReadiness service, clearing cached profiles, restarting explorer.exe, or rebooting the session hosts? Ans : NO

Is GPU acceleration enabled and have any graphics-related errors in Event Viewer for the host pool? Ans : NO

1 answer

Your answer

Manoj Chauhan 65 Reputation points

2025-11-23T12:23:15.29+00:00

Are there any specific error messages displayed when the black screen occurs or when browsers crash? Ans : No Error Messages, just the browsers crash.

How often do the browsers crash, and which browsers are primarily affected (Edge, Chrome, Firefox, etc.)? Ans : intermittent, but when it happens all the browsers are affected.

Have there been any recent changes or updates to the VDI environment, session hosts, or user profiles before these issues started? Ans : No

Are the users experiencing issues isolated to specific applications or accessing unique resources compared to unaffected users? Ans : Its like when someone is affected, they face the issue and if they don't noting happens.

When does the black screen occur—immediately upon login, intermittently during sessions, or after performing specific actions? Ans : Upon Login, no response, just black screen.

Are all users impacted or only a subset? Similarly, are all session hosts exhibiting this problem or only certain hosts? Ans : When the issue occurs, multiple session hosts are affected.

Are FSLogix or other profile management services in use, and have profile recreations or cleanups been attempted to rule out profile corruption? Ans : Yes, FsLogix is used. cleanups have not been attempted. Would need guidance

What version/build of Windows 11 multi-session is running on the hosts, and are all relevant updates, patches, and drivers installed? Ans : Windows 11 Enterprise Multisession 23H2

Have users or administrators attempted any workarounds such as disabling the AppReadiness service, clearing cached profiles, restarting explorer.exe, or rebooting the session hosts? Ans : NO

Is GPU acceleration enabled and have any graphics-related errors in Event Viewer for the host pool? Ans : NO

Answer 1

Jilakara Hemalatha 6,055 Microsoft External Staff Moderator

Hi Manoj Chauhan,

Thanks for sharing the details. Azure Virtual Desktop users might encounter sign-in issues that result in a black screen. There are multiple possible causes for black screens, but users can be impacted from issues synchronizing with AppReadiness, and multiple sessions signing in or out.

To check the AppReadliness issue -- Please open Event Viewer >> Windows Logs >>

Application and check for:

Event ID 1000 – AppReadiness crashing

Event ID 215 – AppReadiness timeout / AppX provisioning delays

User's image

Reference: Microsoft-Windows-AppReadiness event ID

Run the Windows App Readiness Troubleshooter: You can access this by typing “troubleshoot” in the Start menu.

2.Restart the AppReadiness Service: Open the Services window (by typing “services” in the Start menu), find the Windows App Readiness Service, and click the “Restart” button.

Set AppReadiness Timeout Registry Key

PowerShell

New-ItemProperty -Path "HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer" -Name "AppReadinessPreShellTimeoutMs" -PropertyType DWORD -Value 1000 -Force

For more details, please refer below documentation:

Azure Virtual Desktop sign-in screen is blank

Update FSLogix: Ensure you're on FSLogix 2210 HF3 or later. Older versions can hang while waiting for user shell readiness.

known issues on Black screen at sign-in

FSLogix Release Notes with Latest versions

5.Update the Remote Desktop Client: Some users have reported that updating the Remote Desktop Client to the latest version resolved the issue.

I hope these steps help resolve the issue. Please feel free to reach out if you have any questions or need assistance performing these actions.

Also, kindly check your private message and provide any requested details.

Jilakara Hemalatha 6,055 Reputation points Microsoft External Staff Moderator

2025-11-24T04:35:13.4666667+00:00

Hi Manoj Chauhan,

Just checking if above provided information was helped you! Please let me know if you have any queries.
Jilakara Hemalatha 6,055 Reputation points Microsoft External Staff Moderator

2025-11-26T13:51:58.41+00:00

Hi Manoj Chauhan,

Just checking if above provided information was helped you! Please let me know if you have any queries.
Manoj Chauhan 65 Reputation points

2025-11-28T04:19:58.4+00:00

Will try the suggestions probably during the weekend and shall let you know next week.
Manoj Chauhan 65 Reputation points

2025-12-10T00:22:38.9433333+00:00

seems like adding the regkey HKLM:\Software\Microsoft\Windows\CurrentVersion\Explorer" -Name "AppReadinessPreShellTimeoutMs" -PropertyType DWORD -Value 1000 -Force has a significant impact, atleast for now, we are not observing the black screen issue.
Jilakara Hemalatha 6,055 Reputation points Microsoft External Staff Moderator

2025-12-10T01:47:15.09+00:00

Thanks for update Manoj Chauhan

As issue was resolved. Could you please accept the answer and upvote it. Thanks
Manoj Chauhan 65 Reputation points

2025-12-11T06:24:24.7933333+00:00

Just when i thought the issue was fixed, the browser crash issue reoccurred again.

Share via

Black Screen | Browsers keep on crashing in Windows 11 - Azure VDI |

1 answer

Your answer