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limited or no connectivity wireless

When I try to connect to Internet via my friend's wireless, I get the "connected" icon and then the "limited or no connectivity" error message and cannot access the Internet.
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Natashenkaz
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Natashenkaz
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AJ524Commented:
I have definitely seen this caused by MAC address filtering and using the wrong password for WEP security (sometimes WEP is even case sensitive depending on the wireless router or WAP that is in use).

I assume you're using a Microsoft Windows machine to connect to the wireless network.  What version of Windows?  Are you using the Windows connection manager or 3rd party software? How is the wireless network protected?  WEP?  WPA?  WPA2? MAC Address Filter?  Are you able to connect to other wireless networks?  Can you connect to the wireless network with security disabled?

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NatashenkazAuthor Commented:
I am using a DELL Latitude laptop with MS XP, I have just upgraded to Service Pack 3.
I can usually connect at any WiFi friendly coffee shop, although some of them do not have a very good or fast connection.
This problem of limited or no connectivity occurred at a friend's home where I am currently house sitting.
The friend gave me his encryption code but I still cannot access the Internet.
I do not know how the Wireless is  protected. I tried to reset the WiFi to no avail.
I tried the 'repair' function in my own computer which, also,  did absolutely nothing.
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AJ524Commented:
I should have mentioned this earlier... but that specific error message you're seeing means that you're on the wireless but not being given an IP address on the actual LAN.  There is either some kind of mismatch in how you've configured your wireless or whatever device on that network that serves up IP addresses (usually the router) is not doing its job.  It is possible that the router is not configured to hand out IP addresses via DHCP, but that is a rare situation.  Process of elimination will help us figure this out.  

Quick experiment:
View the wireless networks and select advanced options from the lower left corner... this will bring up a menu that allows you to manage the wireless networks that you have configured on your laptop.  Find your friend's network that you're trying to join on that list of networks and delete it so that you can configure it again from the beginning.  This time, change the encryption password by one digit...  make a 1 into a 2 or something simple like that.  Clearly, this won't get you on the wireless network but it will help us understand this symptom.    
After you set up this wireless network again with that one altered digit, if you're still able to join the network and still seeing the same error message as before, it shows that the problem COULD be that you're typing the wireless password incorrectly.  Alternatively, if it does not allow you to join the network, it shows that you likely had the encryption code correct.  If this is the case, change the encryption code back to what it should be and re-join the network and we will have eliminated a mis-typed code as the cause.

One more thing...  is the wireless encryption code you're using a 26 character WEP key?  If so, remember that a key like that is in hex form and there is no letter O in hex... it's always a zero.
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NatashenkazAuthor Commented:
I found out it was a 64 WEP and used the appropriate numerical encryption code and it worked.
Muchas!
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