you can see people are eager to help, I just wrotre out a huge text for you and my f...g computer crashed??
anyway I'll do it in a simpler way

By default, objects appear in wireframe display. To view objects with shaded
surfaces, choose a shade mode from the Shading menu on the view panel. The
hotkeys for these options are shown in the following table:
For NURBS objects (objects created from NURBS curves), you can also control how
smooth the surface appears using the items under Display > NURBS Smoothness.
This affects display only, not how the object renders. The hotkeys are in the
following table:

4; Wireframe
5; SmoothShade
6; Smooth Shade with Hardware Texturing
Object mode Component mode

1; Rough
2; Medium
3; Fine

7; will make your objects black until you create lights into your scene.

the reason its slow??? might be the computer sorting directories if its new?? unlikely though, just wishful thinking.