We are trying to uninstall and re-install a 2008R2 instance. We have uninstalled the database engine but when we tried to re-install it we got the error "Original instance id\name in use".
The instance is on a VM machine (no cluster). Unfortunately there is another (production) instance on the same machine.
The steps taken were as follows:
- Back up the databases
- Uninstall the instance
- Attempt re-install failed
- Review registry for any possible references to the database engine and that instance name and remove them.
- Attempt re-install - same error.
We did discover that there is a reporting server instance with the old instance name already installed but I wouldn't have thought that the instance name on a reporting server instance would affect the install of a database engine instance.
Any suggestions on what we are missing?