It appears to be where the JRE caches downloaded applets. When you deleted temporary Internet files, did you do so from the Java control panel?

1] Clear Java cache It is the first thing you must do if Java is not working on your computer. At times, the old cache could cause issues running the program.

Learn how to download, install, delete, update, uninstall Java and to view & manage Java Runtime, Runtime Environment, JRE Settings, Java Cache in Windows.

Red Hat's proposed specification, designed to reduce the need for separate Java distributed caches, has generated debate within the JCP.