Are you sure it was the JRE version & not one of the other versions? It sounds to be too big to be the "general" use version. I'd recommend uninstalling it. Then reinstalling using the latest. In fact, I'd recommend installing the beta Java 1.6
http://java.sun.com/javase/6/download.jsp (
JRE "Offline" version) which is a 15.72 MB
BTW you will need to uninstall "ALL" your java versions before you install Java 1.6 or else Java 1.6 won't load when you run LW.
Use your Add/Remove programs control panel to remove your java versions.