Which model computer?  Which version of Windows?  Which make and model wireless adapter?

 

To help troubleshoot this problem, go to Start > Run and type cmd then click OK. In the command prompt window that opens, type ipconfig /all then hit the enter key. Write down the output from this command or select it and save it to a txt file, then copy this output into a reply to this message.

 

Steve

Thanks Steve

my computer is Dell dimension 3000, windows xp, belkin wireless adapter,

 

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\IAN>
C:\Documents and Settings\IAN> ipconfig/all

Windows IP Configuration

        Host Name . . . . . . . . . . . . : COMPUTERROOM
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : home
                                            home

Ethernet adapter Network Bridge:

        Media State . . . . . . . . . . . : Media disconnected
        Description . . . . . . . . . . . : MAC Bridge Miniport
        Physical Address. . . . . . . . . : 02-11-11-BC-FF-1F

Ethernet adapter Wireless Network Connection:

        Connection-specific DNS Suffix  . : home
        Description . . . . . . . . . . . : Belkin High-Speed Mode Wireless G US
B Network Adapter
        Physical Address. . . . . . . . . : 00-11-50-C3-AA-B1
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.1.4
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.1.1
        DHCP Server . . . . . . . . . . . : 192.168.1.1
        DNS Servers . . . . . . . . . . . : 192.168.1.1
        Lease Obtained. . . . . . . . . . : 11 November 2007 18:17:52
        Lease Expires . . . . . . . . . . : 12 November 2007 18:17:52

Ethernet adapter Local Area Connection 3:

        Connection-specific DNS Suffix  . : home
        Description . . . . . . . . . . . : BT Voyager USB Remote NDIS Device
        Physical Address. . . . . . . . . : 00-16-E3-07-5A-66
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.1.2
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.1.1
        DHCP Server . . . . . . . . . . . : 192.168.1.1
        DNS Servers . . . . . . . . . . . : 192.168.1.1
        Lease Obtained. . . . . . . . . . : 11 November 2007 18:56:34
        Lease Expires . . . . . . . . . . : 12 November 2007 18:56:34

Before trying to help you fix the problem, I need more information concerning devices in your ipconfig output.  First of all no etherent adapter shows up there.  I know the 3000 has a built in ethernet adapter, but it doesn't show up here.  did you disable it?  Second, what is the BT Voyager USB Remote Device?  Are you connecting to the modem/router by a USB connection in addition to your wireless USB adapter?  Third, do you have any idea why there is a MAC Bridge MiniPort installed on your system?  Were you ever using Internet Connection Sharing on this computer?

 

Steve

I have not disabled the ethernet adapter that i know off. The computer is connected to the router by a blue usb cable, I dont know why the mac bridge  miniport  installed i have never used the internet connection  sharing on my computer. thanks for taking the time to answer my queries. It seems to be some sort of browser problem

Set a Restore Point, then go to Network Connections, and remove the MAC Bridge MiniPort.  Unplug the USB connection from the computer to the router and see if you can now get a wireless connection.

 

Steve

can you also do a

ping yahoo.com -t

in the command prompt

and check how frequent your connection will timeout