Windows Server January 2022 Cumulative Updates are once again available through Windows Update after being pulled yesterday for no official reason from Microsoft.
On Tuesday, Microsoft released the cumulative updates for January 2022 Patch Tuesday, with the KB5009624 update for Windows Server 2012 R2, KB5009557 for Windows Server 2019, and KB5009555 for Windows Server 2022.
After Windows administrators installed the updates, some found that their Windows servers entered boot loops, ReFS volumes became inaccessible, and Hyper-V failed to start.
After the numerous issues, Windows administrators told BleepingComputer, and our own tests showed that Windows Update no longer offers new Windows Server updates. However, they were still available through WSUS and through the Microsoft Catalog.
When we asked Microsoft why they removed updates from Windows Update, we were only told that “Microsoft is aware and investigating the issue”.
Starting today, Windows Server updates are once again available through Windows Update without any reason from Microsoft for initially removing them.
Microsoft has also officially confirmed boot loop and Hyper-V issues as “known issues” in Windows Message Center.
“To note: On Windows Server 2016 and later, you are more likely to be affected when domain controllers use Shadow Principals in Enhanced Security Admin Environment (ESAE) or environments with Privileged Identity Management (PIM).”
For Windows Server 2012 R2, Microsoft has also created a new known problem for Hyper-V issues, stating that it affects devices using UEFI.
Microsoft says they are investigating both issues and will release a fix in a future update.
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