It would be helpfull, if you provide same more info:
- What version of Window are you running?
- Do you have fixed IP address or you obtain it dynamicaly from your cable provider?
- Any other relevant info from Control Panel -> Networking

>Hello,
>
>I have a 3COM 10/100Mbs NIC. This NIC is connected with my cable modem. If all goes well I get a TCP/IP address from my IP. But I have the following problem: it has happened several times that my TCP/IP address suddenly changes to 169.???.???.???. When this happens, I must reboot. I already had to reinstall my NIC twice because even a reboot wouldn't recet my TCP/IP address.
>How can I solve this problem ??