3 crazy problems...

[TheCookieManCan]

I have 3 problems with 3 different computers.
My first problem is, on a computer running Vista, it freezes whenever i go out to sea. My second problem is on a computer running xp, i log in and the screen goes black as it should b4 it connects, but then it crashes and returns to the login screen. And my final problem is on another computer running xp, it says the server is temporarily unavaliable but it is still trying. This one has a D-Link ADSL router if that helps. Please answer me with atleast an answer to one!