Huh.

I re-enabled each of the three, one at a time, and didn't notice any problems. Even with all three re-enabled, DX9 worked just fine. That seems to suggest that cleanboot didn't actually do anything, even though that was what we tried when it worked. But yesterday those same things were enabled and everything worked OK on DX9, so it's somehow back to how it was before the problem began, but I'm not sure why.

DX11 is no good on any settings.

I also got a couple of those wrong ID/password messages people have been talking about in another thread, but if I just re-input my information it took the second time.