Apple Products Won't Connect to Xfinity Wi-Fi Network?

I just moved to Maryland and our family opted for Comcast's new "Xfinity" to supply our cable and internet. Suddenly, there's a problem with our Apple products connecting to the Wi-Fi network. I have a Macbook Pro (2009), running Lion, and two members of our family have iPhones, one a 4 the other a 4S, both running iOS5. Quite often, after we have been using the network, the connection will fail. However, we also have PCs running Windows 8, and it has never had the connection drop. They continue to work while the Apple devices won't. Even when rebooting any end of the connection, let it be the router or the PC/phone, we're still disconnected for some time.

Does anyone have an idea of what is going on? Is this an Apple or Comcast problem? Lastly, does anyone have an idea of how to fix it?

In the command box type IPCONFIG/ALL to see if everything hs an IP address (some may say Media Disconnected)
If that is your problem, try this
go to Start
Right click my computer
Click Manage
Under Services and Applications go to Services
Look for Disabled (with Wi-Fi), right click and re-enable it, apply, OK

Having same problem though what he segmented did not work. Any other options?

Same issue here… F… Apple

I'm having the same issue it affects my apple Tv my and my brothers ipads and my other brothers iPhone this is a big problem and its very RAGE inducing

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