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Here's my WiFi problem. I'll notice that my internet stops responding, so I instantly go to restart the Airport card... then this happens.

http://www.youtube.com/watch?v=aVrMHQ-smMo

The first thing you should do is move your Airport Connection to be the #1 connection in Network Preferences. I noticed in your video in the Network Preferences you have it as #3. Drag it to the #1 (top) position.

Next is read this article about DNS settings from MacWorld and change your DNS settings to the ones recommended.

http://www.macworld.com/article/146064/2010/02/troubleshootdns.html?t=234

If you still have issues then download iStumbler (Google it) and this will tell you all the Wi-Fi networks in your area and what channel's they're on. If you are competing for a channel then simply the channel on your router to one that not within close range of your system.
 
Just out of curiosity folks: What exactly do you mean 'Wifi drops out?' What are the symptoms of this? I have been having some issues since my SL upgrade. If you note the picture below, it has a status of "on" next to airport. But if I just sit there watching it, the status will 'toggle' between "On" and "Looking for Networks."

Is that normal? Could be unrelated to my problem and yours, but just thought I would ask :eek:





Screenshot2010-07-28at115054PM.png
 
The first thing you should do is move your Airport Connection to be the #1 connection in Network Preferences. I noticed in your video in the Network Preferences you have it as #3. Drag it to the #1 (top) position.

Next is read this article about DNS settings from MacWorld and change your DNS settings to the ones recommended.

http://www.macworld.com/article/146064/2010/02/troubleshootdns.html?t=234

If you still have issues then download iStumbler (Google it) and this will tell you all the Wi-Fi networks in your area and what channel's they're on. If you are competing for a channel then simply the channel on your router to one that not within close range of your system.

Well I moved it up, right below Ethernet since I want Ethernet to take over when it's connected.

As far as DNS goes, I configured my router months ago to use OpenDNS, and so far it's been great. It just started having this problem. I think it's strictly with the OSX Software.

It works fine in Windows 7. When this happened, I booted Windows 7 and it was working 100% fine. Even used WiFi to upload the video.

I live in a rural area. I have the only wireless network in range.

OSX was just installed last Thursday when I got my new SSD drive. I also have very little non-Apple software. Those two prefpanes in my system preferences, iStat Pro, Windows Live, Firefox, and Chrome. That's it. I also have nothing downloaded and none of my files restored. It's basically a virgin system.

What happens is that my internet stops responding, right? Well, I turned off the Airport card. Then that happens when I try to turn it back on.

Screen shot 2010-07-28 at 11.04.50 PM.png
 
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