I suddenly don't have an IP address and can't connect to the Internet!

A friend came over about a week ago and started playing with my MacBook pro. For most of the week I kept dropping the wifi signal. Then yesterday it wouldn't connect anymore. I tried restarting it several times, and renewing the DHCP lease, and removing all the remembered networks. Tried running the assistant and diagnostics, with no help. It says I don't have an IP address and that's why I can't connect. Any help?

Morning Serahhaggerty,
For more information on this, take a look at this article:
Solutions for connecting to the Internet, setting up a small network, and troubleshooting
http://support.apple.com/kb/HT1714?viewlocale=en_US
For troubleshooting on this, take a look at this article:
Mac OS X: Troubleshooting a cable modem, DSL, or LAN Internet connection
http://support.apple.com/kb/TS1317
Hope this helps,
Mario

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I suddenly don't have an IP address and can't connect to the Internet!

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