Several versions of Windows 10 and Windows 11 are today receiving an out-of-band update to address some problems that were reported after installing the January cumulative updates. Today's emergency update fixes the following issues:
- Windows Servers domain controllers might restart unexpectedly: "After installing KB5009555 on domain controllers (DCs), affected versions of Windows Servers might restart unexpectedly. Note: On Windows Server 2016 and later, you are more likely to be affected when DCs are using Shadow Principals in Enhanced Security Admin Environment (ESAE) or environments with Privileged Identity Management (PIM)."
- Certain IPSEC connections might fail: "After installing KB5009566, IP Security (IPSEC) connections which contain a Vendor ID might fail. VPN connections using Layer 2 Tunneling Protocol (L2TP) or IP security Internet Key Exchange (IPSEC IKE) might also be affected."
- Virtual machines (VMs) in Hyper-V might fail to start: "After installing KB5009624 on devices using UEFI, virtual machines (VMs) in Hyper-V might fail to start."
- ReFS-formatted removable media may fail to mount or mount as RAW after installing January 11, 2022, Windows update
The Windows maker explains:
Take action: Out-of-band update to address issues after installing the January Windows update
Microsoft is releasing Out-of-band (OOB) updates today, January 17, 2022, for some versions of Windows. This update addresses issues related to VPN connectivity, Windows Server Domain Controllers restarting, Virtual Machines start failures, and ReFS-formatted removable media failing to mount. All updates are available on the Microsoft Update Catalog, and some are also available on Windows Update as an optional update.
Available Windows Server, 10, and Windows 11 updates
The following updates are available for Windows 11 and several versions of Windows 10. The updates can be installed via Windows Update, or manually through Microsoft Update Catalog.
- KB5010795 (Build 22000.438) for Windows 11
- Windows Server 2022: KB5010796
- Windows 10, version 21H2, 21H1, 20H2: KB5010793 (Builds 19042.1469, 19043.1469, and 19044.1469)
- Windows Server, version 20H2, 20H1: KB5010793
- Windows 10, version 1909, Windows Server, version 1909: KB5010792 (Build 18363.2039)
- Windows 10, version 1607, Windows Server 2016: KB5010790
- Windows 10, version 1507: KB5010789
- Windows 7 SP1: KB5010798
- Windows Server 2008 SP2: KB5010799
Check out this support document for more details of the bugs that Microsoft is addressing with today's out-of-band updates.