In order to continue installation all you have to do is open the Windows Task Manager -> go to the 'Processes' tab -> Select the process RSO3MiddleTierService.exe -> click on 'End Process'. Similarly for RSO3Server.exe
Then you can resume the installation process.
Hope this helps.
that solution worked! Thank you.
This worked. I thank you as I would never have figured out this solution on my own.