I have a server with Windows Server 2008 R2. It had several versions of SQL server installed, including multiple instances of SQL server 2008 R2. I uninstalled everything I could using the windows installer (control panel-> programs and features). However, after removing one instance of 2008 R2, the Windows Installer entries completely disappeared, leaving other instances of SQL server installed and running. I've been searching MSDN and these forums for several hours, but everything I find points to the windows installer (which doesn't have the entries), or the original installation media (which I don't have because all the SQL versions were installed by other software).
As far as I know the following versions of SQL server were installed
SQL 2008 R2 32 bit (no instances used)
SQL 2008 R2 64 bit (2 instances)
SQL server 2012 (1 instance)
At this point, I'm not even sure what's been removed, and what hasn't been removed.
Is there some utility for completely removing all of it? Or is there some utility that could rebuild the Windows installer entries?
Or would I be better served by simply re-installing windows server 2008 R2 completely?
To clarify, my end goal is to completely remove all versions of SQL server, and all data associated with them, so I can do a clean install of the only version I actually want to use.