SQL Server 2008R2 SP1 instance not available for adding features I need to add fulltext capabilities to an existing SQL Server 2008R2 instance but the one I need to upgrade is not actually available. The combobox shows only the one selected, as in the picture. It looks like it could be related to different versions of the two instances but I can't explain why. Any ideas?
I agree with Mark's comment.  Perhaps the default instance was installed with SQL 2012 (code name denali) beta or release candidate?  If that's the case then you should be able to use that installer to try to add features but older versions of the binaries (like SQL 2008 R2) would not be able to.