Hi, I've had a Macbook Pro for a few months now, but I'm still a very new Mac user. All was well until a week or so ago, when suddenly I found that on opening the Macbook up the internet connection seemed to have hung. I try to get email in Mail but it won't work, and after trying for 30 seconds or so Mail stops with little exclamation marks next to the various accounts. Firefox always seems to have hung, and I have to close it down and re-start to get it going again. Safari tells me I'm not connected to the internet, but when I follow the diagnostic link it offers it tells me my connection is working perfectly. All this continues for a couple of minutes, and then things start to work again. I've scoured the net to try to find an answer, but although I've come across several people with similar problems I haven't found a solution. I followed advice to repair permissions, but that hasn't solved the problem. I've tried turning WiFi off/on/off but that doesn't seem to help either. My PC working wireless upstairs is fine, BTW, so I don't believe the problem really lies with my connection. I realise this sounds vague, but I *think* the problem started after an OS upgrade/update. I'm on OS X 10.7.2. Because I'm new to Mac I don't know where to look to find out when the last update was, and I don't know whether it might be possible to roll it back or something. I'm almost sure, though, that about a week ago (just before the problem started) I got a message asking whether I wanted to install an OS update. Unfortunately I don't know how to check. If anybody can help I'd be very grateful. Until now I haven't had a problem with connectivity. This is becoming a major pain, though.