2012
07.26

A new KB article for Windows Server 2008 R2 Failover Cluster validation was posted overnight. 

When you run the Failover Cluster Validation Wizard, the report indicates that one or more nodes contain an unsigned acpipmi.sys driver. However, the actual driver is a signed driver. The validation warning message may resemble the following:

The node ‘node1.contoso.com’ has unsigned drivers.

Microsoft ACPI-Compliant Power Meter Device SYSTEM 6.1.7601.17514 6/21/2006 12:00:00 AM Microsoft acpipmi.inf ACPIACPI000DPMI Microsoft ACPI-Compliant Power Meter Device

This issue occurs when the acpipmi.inf file is missing from the C:WindowsInf folder. The reason why the acpipmi.inf file is missing has not been determined.

To resolve this issue, follow these steps:

  1. On a server that is running the same version of Windows Server 2008 R2, has the same architecture, and the same version of Windows Server 2008 R2 service pack installed, locate the acpipmi.inf file in the following folder:

    C:WindowsInf

  2. Copy the acpipmi.inf to a flash drive or to a network share.
  3. On the server that is experiencing this issue, copy the acpipmi.inf file into the following folder: C:WindowsInf

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