So, since yesterday I have quite obviously caught something that Windows Defender doesn't recognize.
Symptoms:
All Google services suffer from Ad injection (non-YouTube ad overlays that cannot be removed as they are not clickable or visible)
Most notably: Google search results have been hijacked! Here is a video showing how only 1-3 results are actual Google results: http://tinypic.com/r/egz953/9
Does anyone know how to systemically get rid of this (Windows Defender is clueless, even after removing the obviously virus-added exclusions)?