Q: What is the manufacturer of your Broadband Router?
Q: Do you manually configure the IP address, netmask, gateway, etc. or do you use DHCP? If DHCP, is that served by your router?
If you don't use DHCP:
Q: When you re-install the TCP/IP stack don't you have to re-configure the card by entering the IP details again?
Q: What are the IP settings of your laptop? Do "ipconig /all" in command prompt and paste the settings here
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