Everytime I enter the Capital City, I get error messages pertaining to the sprite. It might also happen in other area's, but The Capital is where I first experienced it. This is a screenshot I took of one of the messages:

I tried just removing Animus, and using the full installer, but for some reason Vista won't recognize when I try installing the file. It just sort of sits there thinking about opening it, but never does. Anyone know how to fix this?
Edit: I made sure that I ran the patcher beforehand.I moved this to the Gameplay & Mechanic Bugs section.