Bump. Tried reinstalling AO n times, installing in different directories, launching by r-clicking and choosing nVidia, adding AO client to nVidia 3D settings list, setting nVidia as the main GPU for my entire system, launching AO in Win7 compatibility mode as well as pretty much all settings in the launcher suggested on the forums. Despite everything nVidia doesn't recognize AO, thus still experiencing fancy red light show, half the GUI keeps disappearing upon opening GMI and ground falls off.
Some specs: Win8.1, nVidia GeForce GTX 860M, Intel HD 4600.