Security News > 2022 > January > New Windows Server updates cause DC boot loops, break Hyper-V
The latest Windows Server updates are causing severe issues for administrators, with domain controllers having spontaneous reboots, Hyper-V not starting, and inaccessible ReFS volumes until the updates are rolled back.
The most serious issue introduced by these updates is that Windows domain controllers enter a boot loop, with servers getting into an endless cycle of Windows starting and then rebooting after a few minutes.
This bug primarily affects Windows Server 2012 R2 server, but other unverified reports say it affects newer versions of Windows Server.
"Installed these updates tonight, in a two server Exchange 2016 CU22 DAG, running on Server 2012 R2. After a really long reboot, the server came back up with all the ReFS volumes as RAW," explained a Microsoft Exchange administrator on Reddit.
Uninstalling the Windows Server updates made the ReFS volumes accessible again.
Not to be outdone by Windows Server, Windows 10 and Windows 11's updates are also breaking L2TP VPN connections.
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