I'd try dell.com and put in your service tag to find specifics on your PC. In those pages should be re-install instructions however some folk can't follow them and will have to get the work done.
This is my original PC from a few years back
i have all the original system cds
but for some reason i cannot get on the internet
seems i cannot load drives using the cd's
the computer was working okj just became sluggish all of a sudden and then i found a winsys32 error so i went to reinstall everything
can someone please help me here as im not computer savy