WIFI signal is too weak, so the speed is falling back to a point where you have the limited/no connectiity. An external antenna on your WIFI adapter(if this feature is supported) will help to increase your TX and Rx signals.

Limited/no connectivity errors can also mean that, if using DHCP, you aren't getting a (proper) IP configuration from a DHCP server.

http://whizblaze.com/network/LimitedTshoot.htm

We need to know what type of modem you have, who is your ISP.
What OS and Service pack are you using.
Is DHCP client enabled in Services.
Is TCP/IP configured correctly.
Are you getting a 169 IP address with your limited or no connectivity.
Have you tried turning on your modem first, then the PC?

Explain all above points to give us a better description of your setup and your problem.

The thread is from over a year ago silly!

I was just concentrating on the last post, which was 1 day ago.

i didnt mean you. i was gonna give you good rep for the good answer but i gave you some on that other thread so it wouldnt let me

oh apologies. no name was stated, so i just guessed since it seemed you were stalking me in over 6 threads in 5 minutes

Thanks for helping, i am still facing the similar problem over 1 year.........

will try to get the info u stated above.