Poor Graphics Despite Recognized GPU

Hey, puzzleaddict! I sent you a message, but I will also comment here in case your PMs are full.

Are you able to help me fix my Sims 3 in-game graphics? I have tried virtually everything, including following your instructions from other threads, editing my NVIDIA & Windows graphics data, and downloading a GPU add-on, but nothing has worked. The game supposedly recognizes my graphics card, but my Sim's skins and clothing textures are still pixelated and poorly rendered. Attached are some photos of my files. I am using a brand new, high-quality gaming computer.

I am not using Steam or EA -- I have a disc. Before starting the game, I have to de-select some of my laptop's cores through Task Manager for the launcher to work. Could this be affecting my in-game texture quality?