Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

As the previous poster mentioned, the game will use the Internet Explorer web browser to connect to the internet. This error is usually cause by conflicts with the web browser. Try adjusting some of the following settings.

Open Internet Explorer, then open the "Tools" setting, go to "Internet Options".
- Under the "General" tab, please delete ALL browser history.
- Under the "Security" tab, please move the slider to the lowest possible settings or no higher than "Medium"
- Under the "Privacy" tab, click “Advanced” and select ‘Accept’ under both First Party and Third Party Cookies.
- Under the "Advanced" tab, please make sure that "Allow software to run or install even if signature is invalid" is CHECKED.
- Make sure that all SSL and TLS (EXCEPT SSL 3.0) are CHECKED. [SSL 3.0 should be UNCHECKED]
- Hit "Apply" to save the settings, and then "OK, to close the Internet Options menu.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!