Malware and spyware infections and removal can cause all kinds of other problems.  Have you tried reinstalling the drivers for the wireless adapter? 

Steve

To help troubleshoot this problem, on the computer with the 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

I downloaded the driver but I still have limited or no conectivity

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

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

Windows IP Configuration

        Host Name . . . . . . . . . . . . : ALEX1
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No
        DNS Suffix Search List. . . . . . : hsd1.fl.comcast.net.

Ethernet adapter Local Area Connection:

        Connection-specific DNS Suffix  . : hsd1.fl.comcast.net.
        Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on
        Physical Address. . . . . . . . . : 00-12-3F-01-E2-8D
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        IP Address. . . . . . . . . . . . : 192.168.1.100
        Subnet Mask . . . . . . . . . . . : 255.255.255.0
        Default Gateway . . . . . . . . . : 192.168.1.1
        DHCP Server . . . . . . . . . . . : 192.168.1.1
        DNS Servers . . . . . . . . . . . : 68.87.74.162
                                            68.87.68.162
        Lease Obtained. . . . . . . . . . : Saturday, June 21, 2008 10:16:33 PM
        Lease Expires . . . . . . . . . . : Sunday, June 22, 2008 10:16:33 PM

C:\Documents and Settings\Al>

First, the ipconfig output does not show the presence of a wireless network adapter.  Is this the complete output of the command?   Second, even if it did show the wireless adapter, you ran the command while the computer was connected by ethernet, so the results would not have told us anything about the wireless connection.

Steve

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

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

Windows IP Configuration

        Host Name . . . . . . . . . . . . : ALEX1
        Primary Dns Suffix  . . . . . . . :
        Node Type . . . . . . . . . . . . : Hybrid
        IP Routing Enabled. . . . . . . . : No
        WINS Proxy Enabled. . . . . . . . : No

Ethernet adapter Local Area Connection:

        Media State . . . . . . . . . . . : Media disconnected
        Description . . . . . . . . . . . : Intel(R) PRO/100 VE Network Connecti
on
        Physical Address. . . . . . . . . : 00-12-3F-01-E2-8D

Ethernet adapter Wireless Network Connection 2:

        Connection-specific DNS Suffix  . :
        Description . . . . . . . . . . . : Dell Wireless 1450 Dual Band WLAN Mi
ni-PCI Card
        Physical Address. . . . . . . . . : 00-0B-7D-21-53-23
        Dhcp Enabled. . . . . . . . . . . : Yes
        Autoconfiguration Enabled . . . . : Yes
        Autoconfiguration IP Address. . . : 169.254.115.16
        Subnet Mask . . . . . . . . . . . : 255.255.0.0
        Default Gateway . . . . . . . . . :

C:\Documents and Settings\Al>

Do you have security (WEP or WPA) encryption enabled on the router?  If so, have you tried temporarily disabling the wireless encryption to see if it works that way?

Steve

I went to the linksys website and ran the set up program and now I am online through my wireless connection.

Thanks