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I have a 2010 Macbook Pro (running Snow Leopard) and I connect to my home internet thru Wifi (via Thompson router).
The problem is, after I choose my Wifi from a list of Wifis and enter the password, majority of the times it fails to connect saying "Incorrect password", even though its correct. All I have to do is keep pressing the return key until a connection is established.
Very few times I get connected automatically without a need to enter the password and sometimes I get the connection on the first attempt, but usually it takes around 5-10 tries.
It doesn't happen to my Windows (vaio) laptop though. Anyone seen something likely and got it fixed?

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Do you need to enter a password everytime you use Wi-fi? Definitely doesn't match the experience I've had with my 2009 MBP. Additional info that might be helpful - what's your OS version (Lion, Snow Leopard, etc.). – JW8 Feb 29 '12 at 0:01
You could try 'Forget this network' in the Airport settings through System Preferences -> Network, then reconnect fresh again – Nathan Dries Feb 29 '12 at 0:05
@JW01: Not really. A few times I connect without entering the password. Updated the question with this info. – Alexander Feb 29 '12 at 2:48
@NathanDries: Your suggestion works. Could you post your comment as answer? – Alexander Mar 6 '12 at 22:15

You could try 'Forget this network' in the Airport settings through System Preferences -> Network, then reconnect fresh again

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It worked well for a week or so but the problem returned back. Will I have to keep forgetting my network again and again? – Alexander Mar 11 '12 at 22:41
Hmm, very strange... Is the network that you are having issues with the highest in your list of preferred networks? – Nathan Dries Mar 15 '12 at 22:36
There are no other networks but this in preferred network list. If there is no other better solution, your one will solve my problem for sometime at least. – Alexander Mar 23 '12 at 18:53
up vote 1 down vote accepted

The problem was solved by a firmware update. It specifically addressed this password issue.

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Firmware issue on what? Your router? – gotnull Sep 11 '14 at 3:19
No. Macbook Pro. – Alexander Sep 12 '14 at 11:47

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