I'm not sure what's causing the problem, but you can turn the volume down and that'll stop the loud noise. :-)
If you mean that you can't click on links like
this (ETS home page) then your browser doesn't want to open new windows for links. I don't use windows, so I have no idea
why you can't.
One thing you can try (safely) is to install
Firefox. (That's
http://www.mozilla.org/ since you can't click on links. <img src="/images/graemlins/smile.gif" alt="" /> ) Firefox is also a web browser, but with many improvements over IE. I recommend you download and install it, then try visiting the ETS forums (here) in firefox and try clicking on a link. If the problem goes away, it's a problem with IE. If the problem remains, it may be that you have some sort of firewall in place. I've heard of firewalls doing this sort of popup blocking before.