Kevin,

first off, it would help if you knew what the actual size of the hard
drive is.  your computer will have many areas in which it will save
temporary files (not simply your internet files) which will accumulate
over time and take up space... if you are using a large hard drive such
as 40gb, you may not notice much difference. if you are using a small
hard drive, such as less than 3gb, then you may notice a difference in
the percentage of free space on your drive.  

there are many options available to you when this is occuring. you can
find someone who knows what they are doing to sit down at your computer
and clean out all the unnecesary files, or you can purchase software
online which will do something similar to this for you (i personally
have not tried any of this software so i'm not sure how effective it is,
maybe someone can chime in).  you can also reformat your hard drive,
which i personally think is a healthy event for your computer if done
from time to time, especially if you have been using your hard drive for
a long period of time without ever formatting it.  the catch is, it's
not an easy process for a non-literate computer user.  my best advice,
if you have no friends who are good with computers, try making friends
with one at a local computer shop, or someone online.  obviously you are
going to have much better luck if you can find someone who will sit down
in front of your computer with you.  at the very least you can find
someone online who will write you an easy to use step-by-step guide to
formatting your hard drive.  a word of caution about this, the older
your system, the more work it will be to replace important device
drivers once you have wiped your drive clean. do NOT attempt to format
your hard drive without accumulating the required discs and floppies you
will need to replace everything.

as for defragmentation: 

if my hard drive had three large files on it (this is obviously just an
example)
and i saved them on it in order: file1, file2, file3... 

then i deleted file2...

so my hard drive would look like:  file1, <blank space>, file3

and next i went to save a new file, file4... but file4 is larger than
file2 was and
when your drive saves the information physically, it begins to write
file4 in the space that was previously occupied by file2.  when it runs
out of physical space there it will continue writing file4 in the space
after file3. 

now my hard drive looks like this:  file1, file4(partA), file3,
file4(partB)

therefore file4 is physically fragmented; the data is broken up into
different physical locations on the disk.  this is what happens every
time you save data to your hard disk.  defragmenting your disk is the
process in which your computer goes through all the data and reorders
it, so that the data for each file is kept together, making your system
far more efficient.

hope this answers some questions, i'm posting to the list in case anyone
else wanted to know as well.

Ghost

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