As part of our SixBit installation, we download and install a copy of SQL Server 2008 R2 Express. SQL Server 2008 R2 Express is a program from Microsoft. During the first time installation, we create a SQL Server database file on your computer.
When the SixBit installer attempts to create the database file, the user sees an "Error 27506 - The server could not load DCOM (7404)".
Security programs and firewalls are designed to protect your computer from programs creating files on your computer, and some of them do not allow the creation of database files. As a result, the SQL query that is trying to create the initial database fails. Known security programs that cause this are CA Security Suite (California Associates) and Nvidia Hardware firewalls.
Try deactivating the security software, then perform the installation and reactivate when completed. If you find a security program that displays this error, and you find the steps to correct it, please report them to us for inclusion in this document.