Holy cow, I wrote a book!
Occasionally, somebody asks how to change the size of the desktop icons,
not because they want to change the size from the default, but rather
because they somehow turned into giant marshmallow men and they want
to get the default size back.
There are two ways to change the size of the desktop icons
on Windows Vista:
When people get into this state where the desktop icons are gargantuan,
it's usually due to
a mouse that went berserk
thanks to some sort of
hardware problem such as a loose connection.
By the time the hardware problem is fixed, the mouse has clicked and
twirled randomly all over the screen, causing all sorts of havoc.