SQL Server 2008 Express R2 Unattended Install

If your system is prepared properly, you’ll see all items in the prerequisite checks pass successfully.

Prerequisites checks successful
Prerequisite checks successful

Important!

When you reach the step called "Ready to Install" – STOP.  Near the bottom of the installation window is a box labelled "Configuration file path:".  Take a copy of this file – you’ll need it later.

Location of configuration file
Location of configuration file

Cancel the install

Click the "Cancel" button now – we’re not actually going to complete the install at this point.  You could, of course, but the whole point of this article is to install SQL Server 2008 Express R2 without any user input.