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Adventureworks SR3 fails to install


I have tried to instal Adventureworks on a new installation of SQL SERVER EXPRESS SP1.
I have ensured that both FILESTREAM and Full-Text are enabled.
After the installer asks for the instance to be used, SQLEXPRESS, it appears to do nothing.
I know that it can take some time according to the dialog which appears.
After 1 hour I felt there must be something wrong and cancelled the installation whiich appeared to work correctly.
In another issue here I have seen that others have resolved the problem by using SQLCMD to run the scripts.
As a new user I am unaware of how to do this and need help.
Environment: SQL is installed in a Windows 7 32 bit guest Virtualbox virtual machine running on a Windows 7 64 bit Host.