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

image The Microsoft Team created an official Knowledge Base article for 2012 Failover cluster.

For windows 2012, there are couple good TechNet wiki articles regarding the hotfixes released for HyperV and Failover Clusters.

List of Hyper-V Hotfixes for Windows Server 2012:

List of Failover Cluster Hotfixes for Windows Server 2012:


The Microsoft Team now created an official Knowledge Base article for 2012 Failover cluster. There are important KBs listed so be aware before putting servers into production:

As of today, the list includes:

Windows Server 2012

Date added




Why we recommend this hotfix



Update that improves cloud service provider resiliency in Windows Server 2012

Failover Cluster Service, CSV Filter and NTFS.sys

This hotfix prevents a CSV failover by fixing an underlying issue in NTFS and by increasing the overall resilience of the Cluster service and CSV during expected pause states. Available for individual download.



Physical Disk resource move during the backup of a Cluster Shared Volume (CSV) may cause resource outage

Failover Cluster Service, csvfs.sys and vhdmp.sys

This hotfix prevents a resource outage when a physical disk resource for the CSV is moved to another node while a software snapshot of the CSV is in progress. Available for individual download.



Can’t access a resource that is hosted on a Windows 8 or Windows Server 2012-based failover cluster

Failover Cluster Resource DLL

This hotfix prevents an error when accessing resources hosted on a Windows 8-based or Windows Server 2012-based failover cluster from a Windows XP-based or Windows Server 2003-based client computer. 
It also resolves an Event ID 1196 with errorThe handle is invalid when the cluster network name resource fails to come online and register in DNS. Available for individual download.



Failover Cluster Management snap-in crashes after you install update 2750149 on a Windows Server 2012-based failover cluster

Failover Cluster Management snap-in

Resolves a crash in the Failover Cluster Management snap-in after update 2750149 is installed on a Windows Server 2012-based failover cluster. Available from Windows Update or Microsoft Download Center.



Windows 8 and Windows Server 2012 cumulative update: November 2012


Improves clustered server performance and reliability in Hyper-V and Scale-Out File Server scenarios. Improves SMB service and client reliability under certain stress conditions. Install update 2770917 by using Windows Update in order to receive the cumulative update as described in KB 2770917.



Error code when the kpasswd protocol fails after you perform an authoritative restore: "KDC_ERROR_S_PRINCIPAL_UNKNOWN"


Install on every domain controller running Windows Server 2008 Service Pack 2 or Windows Server 2008 R2 in order to add a Windows Server 2012 failover cluster. Otherwise Create Cluster may fail when attempting to set the password for the cluster computer object with error message:CreateClusterNameCOIfNotExists (6783): Unable to set password on <ClusterName$> This hotfix is included in Windows Server 2008 R2 Service Pack 1.

Bulent Tolu

Bulent Tolu

Sr. Systems Engineer at VMware
Bulent is an IT professional with Master's in MIS and 10-years of experience in broad range of Information Technologies. He is exposed to engineering/architecting, implementation/integration, and administration of various high-available IT systems and infrastructure. He has a passion to continually research, test and evaluate new technologies and follow industry best practices to secure and optimize IT systems. Currently, he lives in Istanbul and works as a Sr. Systems Engineer at VMware.
Bulent Tolu

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