An error occured while installing the dependencies. Please restart the computer and tun the setup again or install the following dependencies manually:SQL Server 2008 Express R2 SP2
as mentioned in the message, you should restart the computer and tun the setup again.
You have to run the SQL installer manually to collect the error info. You can find the SQL installation SQLEXPR_x64_ENU.exe in the dependencies folder of the installation DVD.