The ruins in the screenshot don't look very much like Dwemer ruins to me, granted, it's entirely possible that Skyrim's take on Dwemer ruins will look different from what we saw in Morrowind, because Bethesda might change the design between games. In fact, the Dwemer ruin in Tribunal looks pretty different from the ones on Vvardenfell, so if a ruin in the same province, just on the mainland, can look so different, it would hardly be a surprise if the ones in Skyrim look a little different from what we're used to as well, even so, when I look at the design of these ruins, the first thing I'd expect them to be is not Dwemer. I'd also agree that they look pretty abandoned, I'd think they'd be kept in better shape if people were living in them, I'd also expect to see some people around there, now, maybe most of the population is inside, but all of them? I'd think there'd at least be some guards, if it were a place like a town.
Whatever it is, though, the ruins look nice, I'll say that much, if other places in Skyrim can look as interesting as this, I'll be pleased.
No this place is definitely lived in, just look at the domed roof on the bottom of the screen, or the big house/cathedral behind the rock where the tower is.
So... how does that prove someone lives there? Sure, it presumably indicates that someone once lived there, but the inhabitants could all be gone now.