Configuring AF settings isn't that big of a change, and can be changed back if need be. There's only two places they could look at this, that being the nVidia control panel and the Skyrim launcher, and that should be checked right off the bat when dealing with the quality of middle distance land textures. I only asked because I had come across this problem before and low AF settings was the cause of it. If an ENB was being used in conjunction with their game then there's also have a possible fix for that.