Did you have a system hang or crash while using your internet browser? If so the program has crashed, damaged part of it's code. Reloading your old browser may be the easiest path.
Another thing you can try is to download and install SUN's java upgrade.
Next try down loading and installing Netscape 7 or 8, but 8 needs way too much memory and a Pent 4 CPU.
Firefox and others based on Netscape/Mozilla usually work too, Opera gave me the most issues.
SBC Yahoo DSL IE has the best compatibility, but the stand alone version of IE now has the greatest vulnerability to Trojan horses and other security weaknesses!
Best wishes on finding the fix