If you don't have the original build of the operating system, which is very likely, you will either need to find a set of restore disks for your system somewhere or use a base Windows disk and then install all the drivers from Dell support site.
If you don't have the original build of the operating system, which is very likely, you will either need to find a set of restore disks for your system somewhere or use a base Windows disk and then install all the drivers from Dell support site.