Error trying to re-install SQL Server 2005 on a Failover Cluster environment

I had to un-install the SQL instance that I have on my virtual cluster.  The reason?  I could not get the Service Pack 2 to be recognized by my BizTalk configuration.  Apparently, the SP2 that I had installed was the 9.00.3027.0 and not the 9.00.3042.1  Monish pointed that out that I might have an older version of the Service Pack [he is the only person I know that reads those EULA information...]

 

I am trying to start from scratch the installation of SQL 2005, and when I run the setup I get this message:

TITLE: Microsoft SQL Server 2005 Setup
There was an unexpected failure during the setup wizard. You may review the setup logs and/or click the help button for more information.

For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft+SQL+Server&ProdVer=9.00.1399.06&EvtSrc=setup.rll&EvtID=50000&EvtType=datastore%5cmachineconfigscopeproperties.cpp%40InvokeSqlSetupDllAction%40SqlInstallConfigScope.InstanceName%400x2

Well, clicking on that link, does not provided any more help. Click on the help and I get this other screen:

the last line tells me about the event type that has failed:

datastore\machineconfigscopeproperties.cpp@InvokeSqlSetupDllAction@SqlInstallConfigScope.InstanceName@0x2

Now, I have the code that causes the installation to fail. What's next?  ;)

Then I found this other technical article on the MSDN 925976, this suggested cleaning up the registry. I went and clear all of the registry entries from my SQLNode1 and I still get the same error.  I then follow the same instructions on my SQLNode2.  This still did not allowed me to run the setup.  So I went one step deeper and instead of removing just the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.X\ registry key like they suggested, I removed all hives starting from HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server.

Success..! now I am able to run the setup on my primary node, and I *WILL* install the correct Service Pack this time.. ;)