Okay, I spent some time just opening various websites in both Chrome and Firefox, cleaning out cookies and cache intermittently. I did this both on my the Win7 system experiencing symptoms as well as on another system running Linux. Over the course of about 90-minutes I was only kicked to the fake Java update page once (again at a different URL). This happened on the Win7 system, right at the beginning, after I first cleared Chrome's browser cache and cookies. It happened when I navigated, again, to The Onion with the fake Java page popping up after the page took some time to load. Something I hadn't considered previously was the fact that The Onion is one of the few websites on which I typically leave Adblock disabled (since it interferes with video playback), so I suppose it is possible that one of the advertisements on The Onion is compromised. However, because I suspected this, I repeatedly cleared cache/cookies and opened The Onion on both systems. I also opened up The Onion in about 20 separate tabs in Chrome on both systems and let them auto-refresh for over 30 minutes. Unfortunately, none of them re-directed to the fake Java update during that time. In fact, to my recollection, I've never seen the fake Java update pop-up on the Linux system at all, in spite of browsing all the same websites on it using the same browser (Chrome).