Currently got two machines connected via a wired router, have now added a wireless access point to allow a laptop to join the network. At the moment it's open, and I assume anyone within range can sneak in so I need to do something about it. Using the laptop, I've found the Network Authentication settings which are set to Open at the mo. Further options are Shared, WPA or WPA-PSK. Which of these would be best to use? Can I set it so the laptop user just needs to enter a password to get on the network, and the two wired computers connect as normal? This networking stuff usually goes over my head pretty quickly so keep it simple if you can, thanks!