Installing Lubuntu on Old Computer

I am trying to revive an old computer of mine. It is a Dell Inspiron 9300 running Windows XP. I am using unetbootin with Grub to install Lubuntu, however when I try to install after restarting the computer I receive an error message along the lines of this: casper vmlinuz not found error 15 Is this install requiring an internet connection? I am not sure this laptop can connect to the internet in the bios, I also tried installing with an ethernet cable connected an was still unsuccessful.