Microsoft has launched emergency Home windows Server updates to deal with a identified challenge stopping Home windows containers from launching.
The difficulty impacts solely containers working below Hyper-V isolation mode, which permits a number of containers to run concurrently on a single Home windows host inside separate digital machines.
“This replace fixes a problem brought on by 2025.04 B container photographs launched on April 8, 2025 the place Home windows containers working in Hyper-V isolation mode may fail to begin in some circumstances if their replace degree did not match that of the internet hosting utility digital machine (UVM),” Microsoft defined.
“The mismatch brought about compatibility issues between system recordsdata, resulting in startup failures. With this replace, containers now accurately entry the mandatory system recordsdata from the host, enhancing reliability and compatibility throughout completely different Home windows variations.”
After deploying this week’s emergency updates, containers will now accurately entry the mandatory system recordsdata from the Home windows Server host, enhancing compatibility and reliability throughout completely different Home windows variations.
Microsoft launched the next out-of-band (OOB) updates for Home windows Server 2019, Home windows Server 2022, and Home windows Server 2025 on Wednesday to deal with this challenge:
The updates will not be delivered via Home windows Replace and won’t set up robotically on impacted servers. Nevertheless, they are often put in manually after downloading the standalone MSU packages from the Microsoft Replace Catalog.
Microsoft supplies detailed steering on learn how to use the Deployment Picture Servicing and Administration (DISM.exe) software to use the updates to a working Home windows PC or Home windows Set up media.
Earlier this month, the corporate fastened authentication points affecting Home windows Server and Home windows 11 24H2 techniques and warned IT admins that restarts could render some Home windows Server 2025 area controllers inaccessible.
Redmond additionally confirmed in October 2023 that Home windows Server 2019 and Home windows Server 2022 safety updates launched on the time broke VMs on Hyper-V hosts, inflicting boot points and displaying “failed to begin” errors.
One yr earlier, in January and December 2022, it launched emergency Home windows Server updates to repair identified points inflicting issues creating new Hyper-V VMs and stopping them from beginning.
