I followed the instructions that you gave and the AirPort seems to be recognising the network now. However, the macbook has become considerably slow now!
The settings that you asked me to tweet are the ethernet settings. I did it, however, no change in the speed. I tried both Safari 6.0 and Chrome. The internet speed is fine on other systems on the same network. Hence, any issue with the internet connectivity can be ruled out.
There were no DNS entries except the wireless routers DNS. I had put my macbook on sleep for 5 mins. When i woke it up, the wifi is not found and hence, not connected! AirPort can see other networks in my area, but cannot see the home network.
Yes, if i connect to the ethernet cable, I am able to connect to the internet.
Then connect your devices via wifi starting with your MacBook connecting first.
The wifi does work now, but the internet connectivity is very slow. I have a feeling after a couple of days, the wifi may stop working once again!
I have restarted the macbook at least 5-6 times, and I have no problem connecting the internet. However, internet speed is an issue.
Yes, I did try the steps you mentioned. Sorry, missed out on mentioning it in my previous comment. However, the internet speed is still pretty bad.
Tried it. Still no improvement in the speed!
I have two other laptops running on Windows 7, which are on the same wifi.
The internet speed has increased, but marginally..