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Home versions of Windows are not supported for Oracle installs - http://docs.oracle.com/cd/E17781_01/install.112/e18803/toc.htm#BABGGAJA
So things may or may not work as advertised.
In general, when you install XE successfully on a supported OS, a database is automatically created for you - you do not need to use DBCA. In fact, the XE install does not include the DBCA executable