Using Internet Explorer, to check if Java is enabled select tools from the main menu select internet options, select the security tab, then select internet under the zone selection area. Move the slider bar to Medium, High safety disables Java for example. If you are using a custom security level then select the custom level button and make sure that Java permissions is set to enable Java and that Run ActiveX controls is enabled. Also, make sure you have the JIT (just in time) compiler option turned on from the advanced settings tab for best performance.