I work as the IT guy at a small private school. I'm trying to help students buy inexpensive computers using a free OS and software. I needed to test the latest free Linux on my workstation as a dual boot. I installed Cheap-Bytes Fedora Core 4 on an WinXP machine's second EIDE drive. The installation went fine but on reboot no GRUB loader menu showed, just plain old XP. I tried this on an identical machine and got the same results. I blew XP away on the second machine and successfully installed Core 4 as a single boot. I had previously successfully installed Cheap-Bytes Linux 10 for dual boot on a third machine identical to the machines that failed. I had the choice of the LILO boot loader in that case. Core 4 only offers GRUB. Is this really a loader issue or something else? Any Ideas?? Can I resurrect the first machine with a boot floppy? How would I configure? I can't see the actual file structure of the machine that won't boot properly. One more question. Where can I get a comprehensible and comprehensive tutorial on GRUB?