SQL 2008 x64 Enterprise installing on Windows 2008 x64 Enterprise Microsoft Cluster Server.
During SQL install verification, it fails a cluster check even thought you've ran a Cluster Verification on your 2008 x64 cluster.
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Rule "Microsoft Cluster Service (MSCS) cluster verification errors" failed.
The cluster either has not been verified or there are errors or failures in the verification report. Refer to KB953748 or SQL Server Books Online for more information.