Select the "Java Web Start Launcher" application in the list or click "Browse," browse to the "C:\Program Files (x86)\Java\jre [version]\bin" folder on your computer and double-click the "Javaws ...

To make Java Web Start Launcher the default program to open JNLP files, open the Charms bar, click the magnifying glass, and then type "Default Programs" (without quotes) into the text field.