November 12, 2024 at 06:38PM
Microsoft has resolved various bugs affecting Windows Server 2025 installations and upgrades, particularly on devices with high core counts. Issues included failed installations, prolonged boot times, and BSOD errors. Users are advised to install the November 2024 update (KB5046617) and follow temporary workarounds to limit logical processors if needed.
### Meeting Takeaways
1. **Resolved Issues**: Microsoft has addressed several bugs affecting installation and upgrade processes, as well as BSOD issues on Windows Server 2025 devices with high core counts.
2. **Symptoms**:
– Installation or upgrade failures/hang-ups.
– Extended server boot and restart times (up to three hours or more).
– Occasional blue screens during app launches or restarts.
3. **Affected Systems**: Not all devices are consistently impacted. To check if a system is affected:
– Use `CTRL+SHIFT+ESC` to open Task Manager.
– Go to the Performance tab and see if there are over 256 logical processors.
4. **Updates**:
– The issues were resolved with updates released on November 12, 2024 (KB5046617) and subsequent releases.
– Users are encouraged to install the latest security updates to benefit from improvements and issue resolutions.
5. **Temporary Workaround**: For users unable to install the November update:
– Limit the number of logical processors to fewer than 256.
– Instructions for limiting logical processors:
– Restart the server and enter UEFI Setup.
– Locate options to adjust cores per socket.
– Ensure the total logical processors (sockets x cores per socket x logical processors per core) is 256 or fewer.
– Restart the server.
6. **Additional Investigation**: Microsoft is also working on resolving another issue related to boot problems and “boot device inaccessible” errors in iSCSI environments.
7. **Availability**: Windows Server 2025 is generally available with a free 180-day trial from the Microsoft Evaluation Center, marking it as the latest Long-Term Servicing Channel (LTSC) release for Windows Server.