Changing Icon Size
Right click an empty space on the desktop.
Select View.
Click Classic Icons.

Another way is to use the scroll wheel on your mouse or trackball. With the cursor on the desktop, press and hold the CTRL key and scroll the wheel to make icons larger or smaller.

cool

http://www.tweakvista.com/

What else were you expecting when you bought it.  Its XP in rehab.  Itll be XP on steroids when it works.