Hi everyone, i received my new dell inspiron 1525 on wednesday all complete with vista and i am having a lot of problems

live messenger being the first. I have the latest version with the update it told me i needed on vista and it lets me log in i'll start conversations all fine but messages people are sending me are simply not showing up. I've tried with different contacts and also signed in as different people and it still happens. I tried downloading aol instant messenger and the exact same thing happened. I am currently using the windows live web messenger which seems to work but is not like using the proper version of msn.
Second problem is java chat rooms. I have the latest version of java downloaded and the necessary updates but sometimes I can't get into java chat rooms at all and when i can it works for about thirty seconds and then no messages appear. Sometimes it kicks me out and says my java environment is interrupted or something.
Lastly and it only seems to be on this website that every time i click a link the green bar at the bottom moves to full and says done but the page doesn't change until I click escape. Very odd!
Please help me,
Mariam.