Microsoft has fastened a number of bugs that trigger set up, improve, and Blue Display of Demise (BSOD) points on Home windows Server 2025 units with a excessive core depend.
The signs embody 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 can also expertise blue screens when launching, restarting, or making an attempt to run apps.
Nonetheless, as Redmond explains on the Home windows launch well being dashboard, these points will not be triggered constantly on impacted units.
To seek out in case your Home windows Server 2025 system is affected, use the CTRL+SHIFT+ESC keyboard shortcut to open the Home windows Process Supervisor and test if the Efficiency tab exhibits over 256 logical processors.
“This subject was resolved by Home windows updates launched November 12, 2024 (KB5046617), and later,” the corporate stated immediately. “We advocate you put in the newest safety replace to your machine because it accommodates essential enhancements and subject resolutions, together with this one.”
Microsoft additionally gives a short lived workaround for individuals who cannot instantly set up the KB5046617 November Patch Tuesday cumulative replace, which requires admins to restrict the variety of logical processors on affected units to lower than 256.
To do this, you must alter what number of logical processors are lively by following these directions:
- Restart your server and enter the UEFI Setup. Navigate by way of the firmware menus, which can range by producer.
- Find any choice which lets you alter the variety of cores per socket.
- Set the variety of cores per socket to a price that ensures the overall variety of logical processors is 256 or fewer (Essential: the overall 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.
“Altering the variety of logical processors will range relying on the firmware put in in your machine,” the corporate added.
Microsoft can also be investigating and dealing on fixing one other Home windows Server 2025 subject inflicting boot issues on methods in iSCSI environments and displaying “boot machine inaccessible” errors on affected units.
Redmond introduced final week that Home windows Server 2025 is typically out there, with a free 180-day trial out there by way of the Microsoft Analysis Heart.
Home windows Server 2025 is now Microsoft’s newest Lengthy-Time period Servicing Channel (LTSC) launch for Home windows Server.