The credentials you provided during SQL Server 2008 install are invalid.
Filed Under (SQL Server 2008) by Just An Admin on 31-01-2009
When installing SQL Server 2008 you are at one point asked to provide the service accounts and passwords for the SQL services and agents. When providing these service accounts and passwords you might encounter one of the following error messages, which prevents you from continuing the installation:
- The credentials you provided for the SQL Server Agent service are invalid. To continue, provide a valid account and password for the SQL Server Agent service.
- The specified credentials for the SQL Server service are not valid. To continue, provide a valid account and password for the SQL Server service.
I don’t know if this is a common problem, but it seems that logging on as the Local Administrator is the root cause for these errors, at least in my case. Logging on as domain admin, not a local admin and i could enter the service accounts with passwords and continue the install without any problem.

Also, one way to get arount this so that you dont have to start the process over is to just set the local administrator account to the service account and then change the service account after the install.
-Mike
I just had the same error trying to install SQL 2008 R2, changed from domain account to local admin and it worked.
Thanks.