Member Avatar for abhi10kumar

I have broadband internet connection, I always shows disconnected with Red cross mark. I Changed another Ethernet card but problem is still same. Light is showing onto MB when I connected to LAN port.
Is there any virus or MB defection ?

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Given the clues in the thread — reports the wired interface shows “Disabled” in XP while an alternate USB connection works, and a swapped NIC didn’t fix it — and correctly pushed basic isolation (router/cable). When physical path is partly ruled out, the problem most often sits in Windows: the Local Area Connection can be disabled or unbound from TCP/IP, drivers can be wrong or duplicated, DHCP can fail (APIPA 169.254.x.x), or the TCP/IP/Winsock stack can be corrupted.

Practical, repeatable diagnostics commonly used on XP:

ncpa.cpl
devmgmt.msc
ipconfig /all
ipconfig /release
ipconfig /renew
netsh int ip reset c:\resetlog.txt
netsh winsock reset

Run the Network Connections applet to confirm the LAN adapter is Enabled and that “Internet Protocol (TCP/IP)” is installed and ticked in the adapter’s Properties. In Device Manager check for the correct adapter entry (no yellow icons), remove old/ghost adapters (View → Show hidden devices) and reinstall the vendor driver. An IP in the 169.254.x.x range signals DHCP failure; a successful renew or a valid DHCP-assigned address means link + DHCP are working.

Other useful checks: try a different router port and a known-good patch cable (as suggested by ), temporarily disable third-party firewalls/security suites, confirm the NIC isn’t disabled in BIOS/power settings, and optionally test the same port with another PC or a live-boot Linux image to separate OS vs hardware issues. If malware is suspected, reset Winsock and run up-to-date offline/bootable scanners. Useful diagnostics to gather for deeper analysis: the full ipconfig /all output and the Device Manager list of network adapters.

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Member Avatar for Kraai

Is your modem/router configured to your ISP's logon details?
What modem/router do you have?
Can you access your router via gateway?

Member Avatar for abhi10kumar

Is your modem/router configured to your ISP's logon details?
What modem/router do you have?
Can you access your router via gateway?

Yes, My modem is configured correctly, I am using Dlink ADSL 2+ 502T modem. If I do connect with USB it works fine.

Member Avatar for Kraai

If you can connect with usb, then it means that your cable/s may be broken, or the port/s on the router may be faulty, or your network card itself. When you connect a cable from your pc network card to one of the ports on the Dlink, can you access the router gateway?

Can you see your gateway ip if you do ipconfig?

Member Avatar for benmar

try to replace your lan cable....

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