The SQL Server failover cluster instance name 'SQLCluster01' already exists as a clustered resource. Specify a different failover cluster instance name.

I got below issue during a new 3+1 SQL server cluster environment setup  for SQL Server 2008 R2 Enterprise. This is because you have already utilize this name as a cluster resource, as resolution you can delete this resource and proceed.  Below is the description of the problem and solution.


Problem:
The SQL Server failover cluster instance name 'SQLCluster01' already exists as a clustered resource.  Specify a different failover cluster instance name.

Resolution

1. Go to command prompt and run Cluster RES -- this will give you status of all the resources

2. Delete the orphaned user using the below command.

        Cluster RES "" /Delete

3. You are good to continue your installation now.