I believe its trying to network boot before booting from the harddisk, if memory serves. Go into the bios and look for anything related to network booting, probably it'll be in the list of boot devices somewhere.
It is, either change boot sequence as mentioned or simply ignore it.
The above is assuming that the laptop boots normally afterwards ! If it doesnt, I suspect that the hard disk isnt being detected/boot files missing and the option "try other boot devices" is enabled in bios