You may ask why i am still running LW Pro 4.12.6??
answer is it does what i need and i am too stingy to upgrade to a "newer, more elaborate version" 50 bucks or so for a 1 year subscription, you are kidding??
Anyway, i recently noticed (yesterday) that LW Pro 4.12.6 would no longer open. The only thing i could remember installing in the last month or 2 was a Java update. It turns out i was now running Java 6 update 20.
I decided to uninstall this update from the add/remove programs, it rolled me back to Java version 6 update 7 and sure enough good old LW 4.12.6 kicked back into life and now opens everytime.
I thought this might assist others using old LW and running Java v6 update 20.