tl;dr at the bottom FYI
Running win8.1, x64, asus laptop. I have recently started getting, well, not popups, but pop-alongsides. I first noticed this in Chrome, when I clicked on the blank area of a webpage. A new tab opened in the background, routing me through reduxmediia.com, then a few other sites, to a bogus Flash Player update. I just closed it and crossed my fingers. It happened a few more times on the same page (reddit's /r/science) and I looked into the page elements and found nothing. This is when I began to get suspicious. It began to happen on other sites, etc, and also occasionally when I click hyperlinks. This should be fairly standard adware, but then it gets wierder. This same thing started showing up in IE, and into a fresh Firefox install as well. I ran a full Malwarebytes scan, and got nothing. It was late, so I left it for the morning at that point.
I use a Surface RT for on-the-go. Booted that up and started browsing on the bus, and bam, I got an identical popup. Only happened once or twice though (I use it less often). My only response to this is ????? as RT has a puny marketshare.
I have not seen this popup on anyone else's computers, even when doing the exact same series of navigations.
I am substantially confused. My question is this: Is this some new type of advertisment, or am I infected somehow?
TL;DR random blank spaces and known links leading me through reduxmediia.com to bogus ads in multiple browsers. Nothing turning up in antivirus. Same thing pops up in Win RT.
I'm experienced in computers, and know some coding basics, but when it comes to stuff like this I am out of my league. Any ideas/suggestions/requests? Help!