I experienced the same problem on my desktop this weekend after installing software for MyBookLive personal cloud support. Firefox had no security certificates! It was so bad I switched to Google Chrome just so I could get access to things on the web. I will try dropping the Java version back tonight and see what happens.
I got a lot of music and photos transferred and was able to backup my wife’s laptop. It’s a good product concept and I will probably buy a second MyBookLive to backup the cloud content once things settle out.
It’s a shame that WD doesn’t recognize that they have a serious issue here.