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List of required hotfixes for Windows Server

Specific Windows Server hotfixes are required before you install or upgrade the Windows Unified Host Utilities, or the installation or the upgrade does not succeed.

The hotfixes that are listed in this section are the minimum requirement. The following tables specify the name and version of the file that is included in each required hotfix for Windows Unified Host Utilities. The specified file version is the minimum requirement.

The Interoperability Matrix lists updates to hotfix requirements when new hotfixes supersede older hotfixes.

Note: The product installer does not check for the hotfixes that are required for Windows Failover Clustering configurations. The installer checks for all other hotfixes.

Windows Server 2016

The following table lists the minimum required hotfixes for Windows Server 2016:

Hotfix When required File name
3197954 Always Cumulative update

Windows Server 2012 R2

Hotfix When recommended File name
2990170 Always mpio.sys
Note: Hotfix package 2990170 for Windows Server 2012 R2 may require a Windows update download. For more information, see the Microsoft Support site.

The following hotfix is not required for Windows Server 2012 R2, but it is recommended:

Hotfix When recommended File name
2908783 Always Msiscsi.sys

Windows Server 2012

The following table lists the minimum required hotfixes for Windows Server 2012:

Hotfix When required File name
2908783 Always Msiscsi.sys
2990170 Always mpio.sys

The following hotfix is not required for Windows Server 2012, but is recommended.

Hotfix When recommended File name
2796995 Always Csvfs.sys

Windows Server 2003 SP2 and Windows Server 2003 R2 SP2

The following table lists the minimum required hotfixes for Windows Server 2003 SP2 and Windows Server 2003 R2 SP2:

Hotfix When required File name
945119 Always Storport.sys
982109 Always Mpio.sys

Windows Server 2008 SP2

The following table lists the minimum required hotfixes for Windows Server 2008 SP2:

Hotfix When required File name
968675 Always Storport.sys
2754704 Always Mpio.sys
2684681 Always Msiscsi.sys

Windows Server 2008 R2

The following table lists the minimum required hotfixes for Windows Server 2008 R2:

Hotfix When required File name
2718576 Always Mpio.sys
2528357 Always Storport.sys
979711 Always Msiscsi.sys
981379 Always Msdsm.sys
2684681 Always Iscsilog.dll

The following hotfixes are not required for Windows Server 2008 R2, but they are recommended:

Hotfix When recommended File name
2754704 Always Mpio.sys
2520235 Always Clusres.dll

Windows Server 2008 R2 SP1

The following table lists the minimum required hotfixes for Windows Server 2008 R2 SP1:

Hotfix When required Filename
2908783 Always Msiscsi.sys
2990170 Always Mpio.sys

The following hotfixes are not required for Windows Server 2008 R2 SP1, but they are recommended.

Hotfix When recommended File name
2754704 Always Mpio.sys
2531907 Always Includes the following collection of files:
  • Failoverclusters.agent.interop.dll
  • Failoverclusters.validation.bestpracticetests.dll
  • Failoverclusters.validation.common.dll
  • Failoverclusters.validation.generaltests.dll
  • Failoverclusters.validation.storagetests.dll
  • Failoverclusters.validation.wizard.dll
2520235 Always Clusres.dll

Windows Server 2008

Service Pack 2 (SP2) is required with Windows Server 2008.