Não é possível remover o nó ativo da instância em cluster do SQL Server 2008 R2

Estou tentando remover o único nó ativo de um cluster de failover do SQL Server 2008 R2.

Tudo verifica e então eu recebo este erro

  Final result:                  Failed: see details below
  Exit code (Decimal):           -568706566
  Exit facility code:            1562
  Exit error code:               14842
  Exit message:                  Cannot create a file when that file already exists. (Exception from HRESULT: 0x800700B7)
  Start time:                    2015-05-30 16:09:38
  End time:                      2015-05-30 16:10:28
  Requested action:              RemoveNode

2015-05-30 18:47:12 Slp: Sco: Attempting to write hklm registry key SOFTWARE\Wow6432Node\Microsoft\MSSQLServer to file C:\Program Files\Microsoft SQL Server\100\Setup Bootstrap\Log\20150530_184438\Registry_SOFTWARE_Wow6432Node_Microsoft_MSSQLServer.reg_
2015-05-30 18:47:13 Slp: Cannot create a file when that file already exists. (Exception from HRESULT: 0x800700B7)
2015-05-30 18:47:13 Slp: Watson bucket for exception based failure has been created





2015-05-30 16:10:24 Slp: Error: Action "Microsoft.SqlServer.Configuration.SetupExtension.ValidateFeatureSettingsAction" threw an exception during execution.
2015-05-30 16:10:24 Slp: Microsoft.SqlServer.Setup.Chainer.Workflow.ActionExecutionException: Cannot create a file when that file already exists. (Exception from HRESULT: 0x800700B7) ---> System.Runtime.InteropServices.COMException (0x800700B7): Cannot create a file when that file already exists. (Exception from HRESULT: 0x800700B7)
2

Alguma ideia sobre o que está causando esse erro?