By Dervish / Last update January 20, 2022

Today, Microsoft released an emergency update, mainly to fix problems with multiple Windows versions, and users are advised to upgrade.

After this January's Patch Tuesday event, Windows Server administrators complained that the new update was causing serious issues with their servers. These bad issues include Hyper-V not booting, the main controller going through an endless reboot loop, ReFS volumes becoming inaccessible and showing up as RAW file systems.

Now, Microsoft has released out-of-band (OOB) updates for certain versions of Windows. The update addresses issues related to VPN connections, Windows server domain controller restarts, virtual machine startup failures, and inability to mount ReFS-formatted removable media. All updates are available in the Microsoft Update Catalog, and some are also available as an optional update in Windows Update.

The specific version updates are as follows:

  • Windows 11, 21H1 (original release): KB5010795
  • Windows Server 2022: KB5010796
  • Windows 10, 21H2: KB5010793
  • Windows 10, 21H1: KB5010793
  • Windows 10, 20H2, Windows Server, version 20H2: KB5010793
  • Windows 10, 20H1, Windows Server, version 20H1: KB5010793
  • Windows 10, v1909, Windows Server, version 1909: KB5010792
  • Windows 10, v1607, Windows Server 2016: KB5010790
  • Windows 10, v1507: KB5010789
  • Windows 7 SP1: KB5010798
  • Windows Server 2008 SP2: KB5010799