I am trying to setup a new environment for SQL Server 2012 AlwaysOn. I inadvertently used some SQL Server 2008 config files initially to do the installs but ran into too many problems. I un-installed SQL Server using program features but apparently that did not remove everything.
Now when I try to use the install wizard, I get to the "Installation Configuration Rules" screen and am presented with a failed status for rule "Existing clustered or cluster-prepared instance". If I click on the "failed" link, the dialog box says
Rule 'Existing clustered or cluster-prepared instance' failed. The instance selected for installation is already installed and clustered on computer SQLNode1. To continue, select a different instance to cluster."
The problem is I absolutely need to use the same instance that I had tried to previously remove. How can I ensure the previous instance has been removed so I can attempt this install again?