Get a windows 95/98 or whatever boot disk, and boot the PC. After it boots, run the command
a:\fdisk /mbr
You have to make sure you put this file on the disk, you can copy it off of the c-drive if you need to.
WHich will re-format your Master Boot Record and the machine will re-boot, clean of LILO. As always, I hope that helped!
Disclaimer:
Beware: Studies have shown that research causes cancer in lab rats.