We have a wireless network in our small high school that is usually trouble-free. Server is 2003 server; clients are XP Professional. We use roaming profiles. There is a bank of five HP laptops in the library that use this wireless connectivity. The machines are identical in model and OS. Four of these laptops function as expected. One of them returns the message "Domain not available" if anyone BUT the admin logs in. Logging in as administrator shows no errors. The network adapter works, and the signal is strong. I created an account and gave this account admin rights to the computer, but could not log in with it, even though I could use that account successfully with the other computers. Why should it work for administrator and nobody else?