[German]Another brief addendum from the July 2023 patchday, because the August 2023 security updates are luring around the corner. I received some user reports that July 2023 updates on Windows 10 (KB5028166) and Windows Server 2022 (KB5028171) are causing a black screen. In the case of Windows Server 2022, Supermicro server systems are particularly affected. Here's a brief summary, what's reported.
Updates KB5028166 and KB5028171
Cumulative Update KB5028171 was released on July 11, 2023 for Windows Server 2022 and is supposed to fix a whole bunch of bugs. I had given details of these fixes in the blog post Patchday: Windows 11/Server 2022-Updates (July 11, 2023). Updates KB5028166 for Windows 10 has been mentioned within the blog post Patchday: Windows 10-Updates (July 11, 2023).
Black screen after July 2023 updates
In the aftermath of July 2023, various administrators have reported problems with a black screen on Windows 10 and Windows Server 2022 after installing the July 2023 security updates. However, the problem does not seem to be particularly widespread, as I have not found any other reports on the web.
Windows Server 2022: Black screen after KB5028171
In the comments to the German post Patchday: Windows 11/Server 2022-Updates (11. Juli 2023), DirkF had posted the following comment (I've translated the comment) and reported a black screen.
As "burnt" for applying updates too late I have installed on a server 2022 hours the updates KB5028171 and KB5027127 which were offered to me. Routine job …
The server, a Supermicro from 2023, booted normally, but only a black screen was visible. Network access via SMB was possible and the services seemed to run normally. In a short moment, a single access via IPMI was possible and I saw in the event viewer umpteen errors "Dwminit".
These occurred exactly after the update and reboot. Access via RDP, TV or IPMI was no longer possible after another reboot. The updates could be uninstalled via safe mode and everything was "normal" again.
On a second server 2022, also a Supermicro, exactly the same error entries appear in the event viewer after the update, but it can "still" be reached via RDP and TV.
In a follow-up comment, DirkF added the following information:
Even after reinstalling the KB5028171 update, the error persists. Access to the server via RDP is not possible. Errors continue to be produced. (Dwminit, The Desktop Window Manager process has been terminated. (Process exit code: 0x800401f0, Restart counter: 8, Primary display device ID: Microsoft Basic Display Driver) etc. every 5 sec).
Update KB5028171 has now been uninstalled and an update pause has been set. Access is possible again.
Another German blog reader confirmed problems with update KB5028171 on Supermirco systems, which cause the login via RDP to abort and then errors on Dwminit are found in the event log. However, my search on the Internet during writing this blog post did not yield any further hits – so it could be that it has to do with a special hardware constellation.
Windows 10: Black screen after KB5028166
In the English-language blog, Marcos, an administrator who are responsible for a large fleet of Windows 10 clients, has reported a black screen on seven of over 1,000 machines.
after to install kb5028166 patch, we are having a black screen issue.
I would like to know how I can prevent that.
Could you help me?
I did the installing of that patch above in around 1000 machines, but im getting that issue in 7 machines.
Is a bit strange picture that only few machines run into this problem. Anyone who has experienced similar problems?
Addendum: Within my German blog, there is a discussion, that in some cases the Backup Assistant is the culprit – uninstalling the CryptoSafeguard driver fixes the issue.
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