Forgot to mention
It's always a good idea to run a DiskDefragment on your system once in awhile
with XP's builtin tool
And make sure to clean out those temp folders once in awhile
Another great utility to help clean your temp folders,cookies, prefetch folder, etc...
Windows CleanupA small download, once it's installed
I like restarting into safe mode
Open it up and click the CleanUp button
Let it finish scanning, could take a bit if temp folders aren't regularly cleaned out
When prompted to log off
Simply restart back to Normal Mode
Keep the standard cleanup in the OPTIONS
But after the first scan you can uncheck Prefetch and just clean this folder every couple of months
Run cleanup on a regular basis, every couple of weeks