Microsoft has mounted a number of bugs that trigger set up, improve, and Blue Display of Dying (BSOD) points on Home windows Server 2025 gadgets with a excessive core depend.
The signs embrace Home windows Server 2025 set up or upgrading processes failing or hanging, in addition to server boot and restarts taking as a lot as three hours (or much more in some instances). Affected customers may additionally expertise blue screens when launching, restarting, or making an attempt to run apps.
Nevertheless, as Redmond explains on the Home windows launch well being dashboard, these points aren’t triggered constantly on impacted gadgets.
To search out in case your Home windows Server 2025 system is affected, use the CTRL+SHIFT+ESC keyboard shortcut to open the Home windows Job Supervisor and test if the Efficiency tab reveals over 256 logical processors.
“This situation was resolved by Home windows updates launched November 12, 2024 (KB5046617), and later,” the corporate mentioned at the moment. “We recommend you install the latest security update for your device as it contains important improvements and issue resolutions, including this one.”
Microsoft additionally gives a brief workaround for many who cannot instantly set up the KB5046617 November Patch Tuesday cumulative replace, which requires admins to restrict the variety of logical processors on affected gadgets to lower than 256.
To do this, it’s important to regulate what number of logical processors are energetic by following these directions:
- Restart your server and enter the UEFI Setup. Navigate by way of the firmware menus, which can differ by producer.
- Find any possibility which lets you regulate the variety of cores per socket.
- Set the variety of cores per socket to a worth that ensures the whole variety of logical processors is 256 or fewer (Necessary: the whole variety of logical processors is calculated by first multiplying the variety of sockets by the variety of cores per socket after which multiplying that outcome by the variety of logical processors per core.)
- Restart the server.
“Changing the number of logical processors will vary depending on the firmware installed on your device,” the corporate added.
Microsoft can be investigating and dealing on fixing one other Home windows Server 2025 situation inflicting boot issues on techniques in iSCSI environments and exhibiting “boot device inaccessible” errors on affected gadgets.
Redmond introduced final week that Home windows Server 2025 is usually out there, with a free 180-day trial out there through the Microsoft Analysis Middle.
Home windows Server 2025 is now Microsoft’s newest Lengthy-Time period Servicing Channel (LTSC) launch for Home windows Server.
