Urgent Important Issue So Urgent

[ryansdistrict]

I am using Windows vista ultimate with AVG anti virus and spyware installed
i am using firefox and ie
from time to time while am browsing suddenly my internet disconnects
For example on firefox this message appears:
Failed to connect
Firefox cant establish a connection to the server at www.google.com

Though the site seems valid the browser unable to establish a connection
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-
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internet explorer also not working
This problem only gets solved when i restart my computer and my conneCtion will be back
Unluckily i CAN'T CLOSE my browser this time i am working on very important stuff

So how can i fix this issue, what caused it

BTW i am using a Dlink router
also the window connection icon near the clock is showing connected and there is internet
ur reply is appreciated please help me asap

Thanks

[johnwill]

When the connection fails, please do this.

Try these simple tests.

Hold the Windows key and press R, then type CMD (COMMAND for W98/WME) to open a command prompt:

In the command prompt window that opens, type type the following commands one at a time, followed by the Enter key:

IPCONFIG

PING <computer_IP_address>

PING <default_gateway_address>

PING 206.190.60.37

PING yahoo.com

Right click in the command window and choose Select All, then hit Enter.
Paste the results in a message here.

<computer_IP_address> - The IP Address of your computer, obtained from the IPCONFIG command above.

<default_gateway_address> - The IP address of the Default Gateway, obtained from the IPCONFIG command above.

If you are on a machine with no network connection, use a floppy, USB disk, or a CD-RW disk to transfer a text file with the information to allow pasting it here.