Hello guys, in the last few days my rMBP started to act weird when it comes to WiFi. It constantly drops the signal or can't find it. Or when it finds it it can't connect or tells me password is incorrect. My iPhone can connect ok and my gf's dell can also connect. We have airport express station (5 months old) I have tried to delete network preferences, I have resetted PRAM, I have repaired HDD and repaired permission but the issue is still happening. When I go to Airport utility it sometimes finds the station sometimes doesn't. And sometimes it doesn't find it but the laptop is connected to the computer. Could you please tell me what can I check myself before I drag myself to the apple store and wait for 1 week before they are free, please? I suspect its either software related or something as if it was hardware then it wouldn't see the network at all, right? And also it works on / off What do you think, please?