Hyper-V: Update List for Windows Server 2012

Hyper-V: Update List for Windows Server 2012

The latest Hyper-V service packs, updates, and hotfixes for Windows Server 2012 are listed here in chronological order.

Applies To: 
Windows Server 2012

These updates and hotfixes can help avoid some known issues and may save you a support call.
A hotfix is intended to correct only the problem that is described in the article. You should not apply the hotfix if you have not seen the symptoms.

noteNote: A catch 22, do you install it to try preventing the problem from occurring or do you only install it if you see the problem and have an outage?

noteNote: Some updates are required only under certain circumstances, as noted in the table.

noteNote: On this link you can find a tool to help you identify which hotfixes and updates are installed and missing: 
http://www.hyper-v.nu/archives/hvredevoort/2013/06/updated-windows-server-2012-hyper-v-and-cluster-hotfixes-and-updates/


Active Updates (Not Superseded by a Newer Update):

KB Article and Date Published Recommended? IC Version Applies to: Availability
KB 2756872: Windows 8 Client and Windows Server 2012 General Availability Update Rollup

(http://support.microsoft.com/kb/2756872)

Published on 10/2/2012
Yes, install on all Hyper-V hosts and supporting storage servers. Fixes a number of networking-related issues in Windows Server 2012 RTM N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2770440: Poor performance when you enable RemoteFX in Hyper-V on a Windows Server 2012-based computer that uses AMD processors

(http://support.microsoft.com/kb/2770440)

Published on 10/17/2012
Yes, if hosting a VDI platform on Hyper-V and using AMD processors N/A Windows Server 2012 Hotfix
KB 2770917: Windows 8 and Windows Server 2012 cumulative update: November 2012

(http://support.microsoft.com/kb/2770917)

Published on 11/2/2012
Yes, install on all Hyper-V hosts and supporting storage servers. Fixes a number of issues including:

-Backup failure when using pass-through disks with Hyper-V VMs

-Operating System stability

-Networking-related issues
6.2.9200.16433 (2008 and later guests)

6.2.9200.16384 (2003 and XP guests)
Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2779768: Windows 8 and Windows Server 2012 cumulative update: December 2012

(http://support.microsoft.com/kb/2779768)

Published on 11/20/2012
Yes, install on all Hyper-V hosts and supporting storage servers. Fixes a number of issues including:

-Network teaming

-Network virtualization

-Storage issues, including iSCSI

-Other networking-related issues
N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2785638: You cannot use the Cisco SR-IOV network adapter on a virtual machine in Windows Server 2012

(http://support.microsoft.com/kb/2785638)

Published on 12/1/2012
Yes, if you use a SR-IOV network adapter with virtual function (VF) capability and you find that the VF is not available on restart of the VM N/A Windows Server 2012 Hotfix
KB 2795944: Windows 8 and Windows Server 2012 update rollup: February 2013

(http://support.microsoft.com/kb/2795944)

Published on 1/16/2013
Yes, includes a number of storage-related (MPIO, NTFS) and network-related fixes N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2803748: Failover Cluster Management snap-in crashes after you install update 2750149 on a Windows Server 2012-based failover cluster

(http://support.microsoft.com/kb/2803748)

Published on 1/17/2013
Yes, if KB 2750149 is installed (KB 2750149 is available via Windows Update) N/A Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2807654: "0x000000C2" Stop error when you try to back up a data deduplication-enabled volume in Windows 8 or Windows Server 2012

(http://support.microsoft.com/kb/2807654)

Published on 1/31/2013
Yes, install on all Hyper-V hosts and supporting storage servers to prevent a crash during backup when using a deduplication-enabled volume N/A Windows 8, Windows Server 2012 Hotfix, Catalog
KB 2809117: Add-TargetPortToMaskingSet PowerShell command fails in Windows Server 2012

(http://support.microsoft.com/kb/2809117)

Published on 2/1/2013
Yes, but this update applies to Windows Server 2012 file servers / storage servers supporting a Hyper-V environment

This issue may cause the Virtual Machine Manager Configuration Analyzer (VMMCA) for System Center 2012 to fail when you use a storage subsystem that supports multi-port per view selection
N/A Windows Server 2012 Hotfix
KB 2795531: You cannot log on to a virtual machine that is running Windows 8 or Windows Server 2012 in a VDI environment

(http://support.microsoft.com/kb/2795531)

Published on 2/2/2013
Yes, if using Hyper-V in a VDI or Remote Desktop Virtualization Host scenario with Windows 8 or Windows Server 2012 as virtual machines N/A Windows Server 2012 Hotfix
KB 2811660: Windows 8 and Windows Server 2012 update rollup: March 2013

(http://support.microsoft.com/kb/2811660)

Published on 2/2/2013
Yes, install on all Hyper-V hosts and supporting storage servers. Fixes a number of issues including:

-Hyper-V switch extensions

-Storage issues / data corruption

-Misc networking issues
N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2806542: "0x000000D1" Stop error on a virtual machine in Windows Server 2012

(http://support.microsoft.com/kb/2806542)

Published on 2/5/2013
Yes, this fix prevents a crash that sometimes happens when using an SR-IOV network adapter. N/A Windows Server 2012 Hotfix
KB 2822241: Windows 8 and Windows Server 2012 cumulative update: April 2013

(http://support.microsoft.com/kb/2822241)

Published on 3/2/2013
Yes, install on all Hyper-V hosts and supporting storage servers. Fixes a number of issues including:

-Network teaming

-Deduplication-enabled VHDs

-VMs stored on removable devices

-Other Hyper-V-, storage-, and network-related fixes
N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2823643: Virtual machines freeze at the "Stopping" state after you shut down the virtual machines in Windows Server 2012

(http://support.microsoft.com/kb/2823643)

Published on 3/4/2013
Yes if clustering VMs with high network load N/A Windows Server 2012 Hotfix
KB 2823958: Virtual switch extension cannot send packets separately through every individual network adapter in Windows Server 2012

(http://support.microsoft.com/kb/2823958)

Published on 3/5/2013
Yes, if using virtual switch extensions with the intention of sending packets through every network adapter N/A Windows Server 2012 Hotfix
KB 2823956: You cannot connect to a database stored in Windows Azure SQL Database in Windows Server 2012 (sic)

(http://support.microsoft.com/kb/2823956)

Published on 3/7/2013
Yes, if using a Windows Azure SQL Database with virtual machines running on Windows Server 2012 Updated; version unknown (wiki to be updated) Windows Server 2012 Hotfix, Catalog
KB 2825135: You cannot perform an online backup operation by using Windows Server Backup in Windows Server 2012

(http://support.microsoft.com/kb/2825135)

Published on 4/3/2013
Yes, if using Windows Azure Online Backup N/A Windows Server 2012 Hotfix
KB 2834026: "0x00000050" Stop error when you try to create a virtual machine or copy a VHD or VHDX file to a SMB share in Windows Server 2012

(http://support.microsoft.com/kb/2834026)

Published on 4/6/2013
Yes, install on all Hyper-V hosts to prevent a system crash when VHD or VHDX files are stored or copied to a remote SMB share N/A Windows Server 2012 Hotfix
KB 2836988: Windows 8 and Windows Server 2012 update rollup: May 2013

(http://support.microsoft.com/kb/2836988)

Published on 4/8/2013
Yes, install on all Hyper-V hosts and supporting storage servers. Fixes a number of issues including:
-Adding pass-through disks to a virtual machine

-Improved reliability of Storage Spaces

-Misc Hyper-V, storage and networking fixes
N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2836402: You cannot add VHD files to Hyper-V virtual machines in Windows Server 2012

(http://support.microsoft.com/kb/2836402)

Published on 4/11/2013
Yes, to correct an issue that could prevent the addition of VHDs to virtual machines under special circumstances N/A Windows Server 2012 Hotfix
KB 2845533: Windows RT, Windows 8, and Windows Server 2012 update rollup: June 2013

(http://support.microsoft.com/kb/2845533)

Published on 5/4/2013
Yes. Not directly Hyper-V related, but updates the Volume Shadow Copy Service binaries, which could improve backup reliability. N/A Windows 8, Windows Server 2012 Windows Update, WSUS, Catalog, Download Center
KB 2832478: Virtual machines crash or take a long time to complete the shutdown process on a Windows Server 2012-based host computer

(http://support.microsoft.com/kb/2832478)

Published on 5/7/2013
Yes. Prevents an issue that can cause a long shutdown process and/or a virtual machine crash N/A Windows Server 2012 Hotfix
KB 2838043: Can't access a resource that is hosted on a Windows 8 or Windows Server 2012-based failover cluster

(http://support.microsoft.com/kb/2838043)

Published on 5/9/2013
Yes. Not directly Hyper-V related, but updates a number of Failover Clustering-related binaries N/A Windows 8, Windows Server 2012 Hotfix
KB 2838988: You cannot manage permissions or create virtual machines on a file share by using System Center 2012 SP1 VMM in Windows Server 2012

(http://support.microsoft.com/kb/2838988)

Published on 5/9/2013
Yes, if using a Windows Server 2012 file server to connect to SAN/NAS storage and then serving up SMB3 storage to separate Hyper-V hosts.

Yes, if you have a file share that was created on an EMC VNX storage device on a computer that is running Windows Server 2012; and when you try to manage permissions or create virtual machines on the file share by using System Center 2012 Service Pack 1 (SP1) Virtual Machine Manager (VMM), the operations fail.
N/A Windows Server 2012 Hotfix
KB 2848344: Update improves cluster resiliency in Windows Server 2012

(http://support.microsoft.com/kb/2848344)

Published on 5/10/2013
Yes, install on all Hyper-V hosts and supporting storage servers if using clustering or ODX, or to prevent issues with backups N/A Windows Server 2012 Hotfix
KB 2844296: Shared Nothing Live Migration fails when you try to migrate a virtual machine to a destination server in Windows Server 2012

(http://support.microsoft.com/kb/2844296)

Published on 5/11/2013
Yes, install on all Hyper-V hosts using Shared Nothing Live Migration N/A Windows Server 2012 Hotfix
KB 2851998: "The last backup did not complete successfully" error message when you back up a Windows 8 system

(http://support.microsoft.com/kb/2851998)

Published on 5/20/2013
Yes. Not directly Hyper-V related, but updates the Volume Shadow Copy Service volume snapshot driver, which could improve backup reliability N/A Windows 8, Windows Server 2012 Hotfix, Download Center
KB 2840681: Computer does not shut down after you remove a virtual switch in Windows Server 2012

(http://support.microsoft.com/kb/2840681)

Published on 5/31/2013
Yes, if using Virtual Machine Queue (VMQ) with a network team N/A Windows Server 2012 Hotfix
KB 2853952: Active Directory database becomes corrupted when a Windows Server 2012-based Hyper-V host server crashes

(http://support.microsoft.com/kb/2853952)
 Yes N/A Windows Server 2012 Hotfix (rollup KB2855336)
KB 2854362: Vmms.exe processes freeze on certain nodes in a Windows Server 2012-based Hyper-V failover cluster

(http://support.microsoft.com/kb/2854362)
 Yes, if Hyper-V hosts are clustered and virtual machines are stored on scale out fileserver.  N/A Windows Server 2012 Hotfix (rollup KB2855336)

 

Superseded Updates (Updates Replaced by a Newer Update, Listed Above):

KB Article and Date Published Recommended? IC Version Applies to: Availability
KB 2796995: ODX causes corruption during Live Migration 

(http://support.microsoft.com/kb/2796995)

Published on 1/2/2013; Replaced by KB 2838669; Replaced by KB 2848344
Yes, critical patch if ODX is enabled

Install KB 2838669 instead
N/A Windows Server 2012 Hotfix
KB 2801054: VSS_E_SNAPSHOT_SET_IN_PROGRESS error when you try to back up a virtual machine in Windows Server 2012

(http://support.microsoft.com/kb/2801054)

Published on 1/17/2013; Replaced by KB 2838669; Replaced by KB 2848344
Yes, includes a fix that addresses potential backup issues. Install on clustered file servers, too

Install KB 2838669 instead
N/A Windows Server 2012 Hotfix
KB 2792867: Virtual switch extension cannot send packets over different network adapters in Windows Server 2012

(http://support.microsoft.com/kb/2792867)

Published on 2/2/2013; Replaced by KB 2811660
Yes, if using a virtual switch extension with the intent of sending a packet over two different network adapters

Install KB 2811660 instead
N/A Windows Server 2012 Hotfix
KB 2799728: Virtual machine enters a paused state or a CSV volume goes offline when you try to create a backup of the virtual machine on a Windows Server 2012-based failover cluster

(http://support.microsoft.com/kb/2799728)

Published on 2/7/2013; Replaced by KB 2813630; Replaced by KB 2838669; Replaced by KB 2848344
Yes, to prevent virtual machines from pausing and to prevent a CSV volume going offline during backups

Install KB 2838669 instead
N/A Windows Server 2012 Hotfix
KB 2813630: Virtual machine enters a paused state or a CSV volume goes offline when you try to create a backup of the virtual machine on a Windows Server 2012-based failover cluster

(http://support.microsoft.com/kb/2813630)

Published on 2/7/2013; Replaced by KB 2838669; Replaced by KB 2848344
Yes, to prevent virtual machines from pausing and to prevent a CSV volume going offline during backups

Install KB 2838669 instead
N/A Windows Server 2012 Hotfix
KB 2811670: Issues when the Audit object access policy is enabled on Removable Storage in Windows 8 or Windows Server 2012

(http://support.microsoft.com/kb/2811670)

Published on 3/2/2013; Replaced by KB 2822241
Yes, to prevent issues with VM storage on removable devices on systems where the audit object access policy is enabled

Install KB 2822241 instead
N/A Windows 8, Windows Server 2012 Hotfix
KB 2819564: Data corruption occurs when you merge Data Deduplication-enabled VHDs in Windows Server 2012

(http://support.microsoft.com/kb/2819564)

Published on 3/2/2013; Replaced by KB 2822241
Yes, to prevent data corruption when data deduplication-enabled VHDs are merged

Install KB 2822241 instead
N/A Windows Server 2012 Hotfix
KB 2833586: Virtual machine does not come online after you add a pass-through disk to the virtual machine in Windows Server 2012

(http://support.microsoft.com/kb/2833586)

Published on 4/8/2013; Replaced by KB 2836988
Yes, to prevent issues with adding pass-through disks with WMI or System Center Virtual Machine Manager

Install KB 2836988 instead
N/A Windows Server 2012 Hotfix
KB 2836121: An update for Storage Spaces in Windows 8 and Windows Server 2012 is available

(http://support.microsoft.com/kb/2836121)

Published on 4/8/2013; Replaced by KB 2836988
Yes, to improve reliability with Storage Spaces. Install this on file servers supporting Hyper-V storage, too

Install KB 2836988 instead
N/A Windows 8, Windows Server 2012 Hotfix
KB 2824600: Virtual machine enters a paused state or goes offline when you try to create a backup of the virtual machine on a CSV volume in Windows Server 2012

(http://support.microsoft.com/kb/2824600)

Published on 4/10/2013; Replaced by KB 2838669; Replaced by KB 2848344
Yes, to prevent virtual machines from pausing and to prevent a CSV volume going offline during backups

Install KB 2838669 instead
N/A Windows Server 2012 Hotfix
KB 2838669: Update that improves cluster resiliency in Windows Server 2012 is available

(http://support.microsoft.com/kb/2838669)

Published on 4/12/2013; Replaced by KB 2848344
Yes, install on all Hyper-V hosts and supporting storage servers if using clustering or ODX, or to prevent issues with backups

Install KB 2848344 instead
N/A Windows Server 2012 Hotfix
KB 2842575: Storage space cannot be repaired or disks are marked as retired incorrectly when you use Storage Spaces in Windows 8 or in Windows Server 2012

(http://support.microsoft.com/kb/2842575)

Published on 4/23/2013; Replaced by KB 2845533
Yes. Install on any Hyper-V host using Storage Spaces.

Install KB 2845533 instead
N/A Windows 8, Windows Server 2012 Hotfix
KB 2840565: Calls made by using pass-through APIs fail on a Windows Server 2012-based computer

(http://support.microsoft.com/kb/2840565)

Published on 5/9/2013; Replaced by KB 2838988
Yes, if using a Windows Server 2012 file server to connect to SAN/NAS storage and then serving up SMB3 storage to separate Hyper-V hosts.

Install KB 2838988 instead
N/A Windows Server 2012 Hotfix
KB 2848727: "Move-SmbWitnessClient" PowerShell command fails in Windows Server 2012

(http://support.microsoft.com/kb/2848727)

Published on 5/10/2013; Replaced by KB 2848344
Yes, if using PowerShell automation to request a Server Message Block (SMB) client to move the associated SMB connection from the cluster node to a specified cluster node

Install KB 2848344 instead
N/A Windows Server 2012 Hotfix

See also this Knowledge Base article for a list of updates related to Windows Server 2012 Failover Clustering:

Recommended hotfixes and updates for Windows Server 2012-based Failover Clusters


For previous releases of Hyper-V, reference the following pages:

Hyper-V: Update List for Windows Server 2008 R2

And

List of updates for Hyper-V in Windows Server 2008

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Wiki - Revision Comment List(Revision Comment)
Comments
  • Richard Mueller edited Revision 1. Comment: Removed (en-US) from title

  • Frank E Lesniak edited Revision 21. Comment: Re-ordered updates according to their publication dates. Added missing updates

  • Frank E Lesniak edited Revision 22. Comment: Moved superceded hotfixes to a separate table

  • Frank E Lesniak edited Revision 23. Comment: Moved superceded hotfixes to their own table

  • Frank E Lesniak edited Revision 18. Comment: Added link to the KB article that lists WS2012 failover cluster hotfixes

  • Frank E Lesniak edited Revision 24. Comment: Added KB 2848344 to replace KB 2838669 and KB 2848727

  • Frank E Lesniak edited Revision 25. Comment: Adding KB2838043

  • Frank E Lesniak edited Revision 26. Comment: Added KB 2845533 and KB 8511998

  • Frank E Lesniak edited Revision 27. Comment: Added KB 2825135

  • Frank E Lesniak edited Revision 28. Comment: Added KB 2834026, KB 2832478, KB 2844296, KB 2838988

Page 1 of 2 (13 items) 12
Wikis - Comment List
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Comments
  • Richard Mueller edited Revision 1. Comment: Removed (en-US) from title

  • Frank E Lesniak edited Revision 21. Comment: Re-ordered updates according to their publication dates. Added missing updates

  • Frank E Lesniak edited Revision 22. Comment: Moved superceded hotfixes to a separate table

  • Frank E Lesniak edited Revision 23. Comment: Moved superceded hotfixes to their own table

  • ArdenW edited Revision 10. Comment: Corrected a KB2785638.

  • Frank E Lesniak edited Revision 18. Comment: Added link to the KB article that lists WS2012 failover cluster hotfixes

  • Frank E Lesniak edited Revision 24. Comment: Added KB 2848344 to replace KB 2838669 and KB 2848727

  • Frank E Lesniak edited Revision 25. Comment: Adding KB2838043

  • Frank E Lesniak edited Revision 26. Comment: Added KB 2845533 and KB 8511998