Hello,
Im not sure if you have been able to fix your computer yet, but I was having the SAME problem. I tooled around with it a while till I got the peroblem fixed myself. I have the same O.S this is what you need to do.
Open a internet Explorer tab
------click on the tools tab
---------click on the programs tab and then click Manage add-ons
Scroll all the way down until you get to the java apps. if any of them are disabled click on it once then click the enable tab then O.K
That should fix your problem it did mine. then go to the java test site you should see the picture in the box now. GoodLuck