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Description

You get one of the following error messages when trying to install Office Communications Server 2007 R2:
"Failure [0xC3EC78D8] Failed to read the Office Communications Server version information. This can happen if the computer clock is not set to correct date and time."

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"[0xC3EC796C] One or more errors occurred during execution of the wizard; the wizard was unable to complete successfully. Please check the log file for more information."


Note: the date and time on the server are correct.

Solution

The issue is caused by KB974571 (MS09-056: Vulnerabilities in CryptoAPI could allow spoofing):
Security Update for Windows Server 2003 (KB974571)

Uninstall this update and reboot the server to resolve this.

Affected software:

Microsoft Windows 2003
Microsoft Windows 2008
Microsoft Windows 2008 R2
Office Communications Server (OCS) 2007 R2

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