Subdirectory:

In order to reduce the clutter in the Windows™ 
environment it is good practice to create subdirectories 
and separate certain type of files.

This will make locating these files easier when needed 
and will also improve the performance of the Windows 
environment. If after a few years of use there are 
several hundred files in the Windows environment then 
every request to open a program needs to go through 
these files attempting to locate the necessary files. 
Even with accelerator video boards and such the process 
is overburdened with this clutter.

An example of a Windows directory with suggested 
subdirectories might be:

C:\WINDOWS\
	  \ICO\
	  \NOTEPAD\
	  \PBRUSH\
	  \PIF\
	  \SYSTEM\ (created upon installation of Windows)