Format C: .... ~~~
Install XP
J/k........
You should get a program called javara. This gets right of the old versions of java and makes sure that you have the most up to date version. If that still is not working for you I suggest that you go to add/remove programs and remove anything java related and go to
http://java.sun.com/javase/downloads/index.jsp and get the newest JRE. If its still not working you could try to right click the application shortcut and enable xp compatability. If its still not working try contacting the company and see if they want a certain version of java for their software. Sometimes certain apps are real picky as to which version you have. Good luck.......