My imac running Lion keeps dropping the Internet.

My imac running Lion keeps dropping the Internet. Sometimes just switching the wi-fi off and on corrects this but sometimes there it says no ip address. I have found restarting router sorts the no ip address. Help can I do something to stop this. Thanks simon

Your profile shows you're using SL, but you posted it in the Lion forum. So, assuming you're using Lion, I've seen posts where creating a new Network Location and adding a different named wi-fi connection has help others with this problem.
You can also check your router for firmware updates.
Many posts on this topic. Search forums for other possibilities.

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    First, changing your DNS settings could not possibly have any effect on this problem.
    When you see an exclamation point in the Wi-Fi menu, from the menu bar, select
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  • IMAC keeps dropping the internet connection using Wi-Fi.

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    Best way ti fix it !
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    ...and this link:
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    Try This...
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  • What is the best way to connect a G4 running 9.2.2 or 10 to an new imac running lion?

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