How to clean machine for SQL2005 Reporting Services RTM

hi all,

I am trying to get Reporting Services to install on a machine that previously had the September CTP install on it.

The SQL Server part of the install has been fine and all seems to be operational as expected but the Reporting Services fails to install with the following errors:

"An instance of the same name is already installed on this computer..."

This is thrown out of the ValidateInstanceName func in the MSI. I am telling it to use the Default Instance as there is only one SQL instance running (to my knowledge).

How do I clean up the machine so that it does not think another instance is present? I have tried MSIZAP and that has not helped. I have removed references from IIS, COM+, file system and registry.. but there must be some I am missing. Does anyone know what ValidateInstanceName is actually looking at/for?

Thanks
PaulIf in doubt..

Uninstall SQL Server 2005 and remove every reference to SQL (as far as possible) from the registry..

Fixed the issue.