Error when installing Lync components (Install CS-Database and Enable-CS Computer Fail)

Question

Receiving the following error when running the Lync components install wizard.  I believe the issue is related to having run the service and installed the database once before, but had an issue installing all of the Lync FE components due to a server
FQDN renaming issue. Server was then named properly, removing the appended suffix, re-ran and redeployed the topology, all great. Now, when running the Lync component install wizard again, we receive the following errors related to installation of the databases
and local stores. I noticed another article related to this problem and per the article, I uninstalled SQL Server, rebooted, re-installed SQL Server from scratch, rebooted, then went back to the Lync FE to run the Lync component wizard again, resulting in
these errors:
An error occurred while applying SQL script for the feature RtcDatabaseStore. For details, see the log file 'C:\Users\ADMINISTRATOR.ECSMARTSUITE\AppData\Local\Temp\2\Create-RtcDatabaseStore-ECSS-LYNCFE_rtclocal-[2014_07_25][16_56_00].log'An error occurred
while applying SQL script for the feature LyssStore. For details, see the log file 'C:\Users\ADMINISTRATOR.ECSMARTSUITE\AppData\Local\Temp\2\Create-LyssStore-ECSS-LYNCFE_lynclocal-[2014_07_25][16_56_20].log'An error occurred while applying SQL script for the
feature LyssStore. For details, see the log file 'C:\Users\ADMINISTRATOR.ECSMARTSUITE\AppData\Local\Temp\2\Create-LyssStore-ECSS-LYNCFE_lynclocal-[2014_07_25][16_56_20].log'
Looking at each of the three logs, received the following errors (in order of each log file listed above):
1.  Creating login ECSS-LYNCFE\RTC Component Local Group.  The server principal 'ECSS-LYNCFE\RTC Component Local Group' already exists.
2.  Directory lookup for the file "\\ECSS-LYNCFE\D$\CsData\LyssStore\lynclocal\DbPath\lyss.mdf" failed with the operating system error 5(Access is denied.)

Answer 1

It really looks like permissions - just for the heck of it, use a domain admin account to do this.  Make sure you're in the local admin group on the server.  
Check out the following link:
http://social.technet.microsoft.com/Forums/lync/en-US/9c4615cd-3fd8-46c3-a962-543e0528c26d/edge-server-installcsdatabase-fails-with-the-server-principal-servernamertc-component-local?forum=lyncdeploy
Here is a quote:
Install SQl management Studio and check if a SQL instance already exists. If so check the DBs and you'll see that the login already exist. Uninstall SQL and leave just Lync core components. Restart and reinstall afterwards. You have this problem probably because you cahnged the name of the machine after runing Lync setup. Hence thesql instance refuse the login.
We just solved this problem this way
if my post is helpful - please click on the green arrow. (please excuse, in advance, any perceived sarcasm/humor - as I often forget it does not translate through text) :)