The first thing I would try is to make a fresh installation with an update of the Java installation.
Uninstall LW and all Java versions on your system. Reboot and then download the JRE offline installer of the newest Java version from here:
http://java.sun.com/javase/downloads/index.jsp
Install it and reboot again, then reinstall LW.

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"Never Argue With An Idiot. They Will Drag You Down To Their Level, Then Beat You With Experience"