It may be possible that your laptop doesn't use a DVD to do a factory restore. Newer laptops have a recovery partition that is usually accessed by pressing a particular F key during boot. What is the Make and Model of your laptop?
I personally recommend using a free program like Macrium Reflect to create a system image of your system after you have it setup the way you like it with the latest system updates, any bloatware removed, "must have" software installed, etc... Restoring to the way it came from the factory via the recovery partition brings you back to the point where you have to start all over again.