They can send you a new restore CD for that system model. You'll probably have to pay for shipping and material costs, but it's your best option.
My in-laws lost the disk for WindowsXP. Virus on current system. I was going to just wipe it clean and install Windows 2000 (because that is all that I had) Coputer won't let me,after "boot from CD" it asks for 1) install previous version of Windows for authentification purposes, or
2) exit setup. What do I do???