One other solution is 'Homeplug'. This uses the mains electric cable to distribute your Internet. Your Modem Router connects to the Homeplug device using a standard network cable, you then have a second device in another mains socket and that connects by a network cable to your laptop. You can move the second Homeplug to wherever you have a mains socket. You just need the sockets to be on the same 'phase' which it will be in a standard house (in an industrial application this might not be the case).
Search 'Homeplug' on ebay or Kelcoo to see suppliers and prices.