Cause: There was an error with the Microsoft SQL Server installation or there was a previous broken installation of Microsoft SQL Server.
Resolution: Manually install Microsoft SQL Server.
Download and install Microsoft SQL Server Express Edition (http://www.microsoft.com/en-us/download/details.aspx?id=29062)
Set the server collation as CIAI and enable mixed-mode authentication.
Re-run the OutSystems Platform Community Edition installer.
*For detailed information about troubleshooting your installation please follow this links: how to start troubleshooting, log files, common error codes.