My Home network is through the Mains, one plugged in downstairs and one upstairs, all working correctly, no problems.
When I plug my laptop into the mains it picks up the network right away.
Now, my lad brought his two laptops down for me to update, remove expired Norton and install MSE on both.
First one with Vista no problem, picked up the Network uninstalled Norton, installed MSE, Updated (25).
Next one XP, plugged into mains, No way would it see the network, WHY,
All my systems are Seven.