More than likely it is erroring out, like the one I am working on now. Failure to create sql. folder, or something like that. The Symp. intall goes great, and quick. The server peps installed directly after symp. install, then starting the db install. after 1st db install reboot, somewhere between steps 5 and 6, the error populates.
There are few things server related I can change, but they do not seem too critcal for this point of the installation. My thoughts are the hot fixes that are installed on the server, thinking of removing them, and trying to install from scratch.