This article is from the the Brief Linux FAQ (BLFAQ) Maintained by Neil Zanella firstname.lastname@example.org
Most likely windows overwrote the MBR (Master Boot Record) hence deleting LILO. If you manually installed the kernel and used "make zdisk" then you can boot from the floppy, otherwise you can download a boot/root floppy distribution of Linux like the one at <http://www.toms.net/rb/> or some other one. Once you get to your hard drive don't forget to rerun /sbin/lilo so that you won't have to boot from the floppy again. If you are using a floppy that boots its own file system then you must first mount your hard drive with something like "mount /dev/hda1 /mnt" and change to the hard drive with "chroot /mnt /bin/sh" before rerunning "/sbin/lilo".