Where is the file that contains the quality and player project settings located?

I need to repair it or delete it and see if it will create a new one on opening Unity. I believe it is the reason my work computer cannot create a build with Anti-Aliasing for other computers. It only creates it for itself and adjusting the editor settings adjust all builds on the computer that have already been built.

Your/Unity/Project/Path/ProjectSettings/

Though, changing the editor settings should have no effect on previous builds. Are you sure you are setting QualitySettings defaults correctly for your builds?