If you're really going to try to keep the old computer
you'd be better off if you do a couple of things. first,
you can get the manuals for it here:
Most older computers have a hidden partition from
which the original system can be re-installed. According
to your manual, your model doesn't have that, but came
with an XP CD instead.
If you still have the CD and still have your software CDs
you should copy all of the patches, SP3, etc. to CDs or
memory sticks, then re-install XP with the Dell CD. That
will give you a fresh setup that should run as well as the
day you got it.
After that, re-install your patches and software.
But a much better approach would be to first try to find
someone who can help you install a new hard disk, *then*
run the Dell XP CD on that. (It's not hard to install, but
there are some details to know about, and it might take
some work to find the right kind of disk. (Known as EIDE
A fresh install will make everything run better. You
don't need more memory or anything else, unless you're
doing something like photo editing on very big digital
photos. If you want more RAM you can always add
it later, but the best thing is to re-install XP.
You're running on borrowed time with a 12-year-old
hard disk. It could go at any time. You *might* get
another 3-4 years out of the computer, with good
functionality, if you re-install *and* put in a new
hard disk. Otherwise you're probably better off not
wasting any more time or money on it.