I have been regularly logging on to local library's public wi-fi network with 2 different laptops. After connecting to the network, any attempt to load a Web page brought up the library's portal, which requires users to agree to terms & conditions, upon which normal Web access is granted.
Today one laptop worked as normal but the other failed. Other patrons in the past had approached me for help because they had experienced the same problem. Web pages simply wouldn't load, but the portal log-in never comes up. I copied the login page URL into a browser and that brought up the portal, but upon clicking the "I agree" button, an "invalid username/password" message pops up (in 3 different browsers). The other laptop worked as usual.
I used Fiddler2 to inspect the HTTP request headers on both laptops and they were identical, (including the login and password, which otherwise are invisible). I tried adjusting security/firewall settings, deleting all temp Internet files, cookies, etc., to no avail.
The library will not help with any connection problems (I don't blame them).
Any other suggestions on what to try? Any help will be greatly appreciated by me and others who ask for help in the future!