Hi, I resolved the problem as follows:

On all of the MCSC nodes search in the registry HKLM for "Hotfix 3204" omitting the quotes - look for the key "Uninstallabe" and...

I'm having exactly the same problem and using the same scenario - I'm installing a 2nd failover named instance and I'm using Windows Server 2003 R2 Enterprise x64 MSCS 4...