The disks will contain the factory-installed OS and device drivers.
From the Dell site:
So, if you have clients with missing disks, here you go: Dell: Request Backup Disks.
- Requests are limited to one (1) set of backup discs per system purchased.
- The backup discs requested must match the operating system that was factory installed on the original order.
You will be required to fill out a form. Not sure if there will be a nominal cost involved.
Microsoft Small Business Specialists