You will need to install the wireless client software for your wireless hardware/card. Windows 2000 was developed and released before wifi was common so it does not have a wireless client like that in Windows XP. All network adapters that are compatible with Windows 2000 come with a client of their own. If the wireless adapter is built in on your notebook, visit the manufacturer's website and look for drivers and software for Windows 2000. You should be able to download the appropriate client from there.