Those discs that restore your PC to default settings which you were prompted to make after first turning on the PC. You made them right away like a good computer user, right?

Assmuming, for whaver reason, you didn't make said discs, you can make them using the Acer eRecovery program (IIRC)

I see. I need to put it on an empty disc right?

Usually 7-9 CDs, 2-3 DVDs, or one BD