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#170
Hello DrLangly, and welcome to Seven Forums.
Most OEM computers these days do not come with a set of OEM Recovery discs anymore. Usually they will have a option for you to create (burn) your own set through the OEM partition instead. Depending on what type you have, these two links from Dell will help show you how to create a set OEM Windows 7 Recovery discs to be able to use to do a factory restore of Windows 7 with.
Dell - Support
or
Dell - Support
Creating a system image will take up a few DVDs since the backup image will basically be the same size as what is used on your hard drive. Each single sided DVD can hold around 4.7 GB on average. It's usually best to save system image backup onto another hard drive or partition instead because of this.
Hope this helps,
Shawn