I rebotted, and the fix did not work.
I went back into the Control Panel, to Display, to Desktop, which was unchanged from the screen shot I posted before. That is, the Browse, Apply, Background, and scroll functions were grayed out/nonfunctioning.
I clicked the Web tab, and noted that the in the menu was My Current Home Page. All the button were functional except Delete which was grayed out. I highlighted the "My Current Home Page" menu item without checking the box, and clicked properties, it gave URL as About: Home.
I think that was the corrupted homepage default used by the QuickNavigate hijacker in the first place.
I think it bollixed up the display options, disabled scolling and menus, and radio buttons which would remove the Bluescreen and Fake Warning message.
What do you think? I have checked with HJT and AdAware daily, and periodically throughout my paranoidal internet browsing since then and nothing seems radically amiss.