I just wiped the hard drive on a desktop computer and used a LiveUSB to install Scientific Linux 6.4, the x86_64 veresion. I went through and simply let the installer use all its default configurations. Once that was done I tried booting up the machine and I got Error 1962: No operating system found. I'm currently reinstalling it without grub and am going to load grub on manually, but it baffles me that its not working after the simplest installation. Is this a common problem? I've never had this sort of thing happen before. UpdateI attempted to use a dvd instead to install, but it wouldn't boot from the dvd, I plugged the USB in with the dvd and am able to load it now. I'm guessing it must have been missing certain drivers to boot from the dvd. Anyways, the install didn't work from the live dvd either. 
Fresh Install Scientific Linux No Operating System
grub;scientific linux