Systm restore discs click here
In the case of Dell's "PC-Restore by Symantec" feature, Dell has supplied the user with a backup image made at the factory, and this backup is stored in the DSR partition. It is this backup that is restored from when the Ctrl+F11 keys are pressed.
A backup image must exist before you can restore from it. If Dell did not ship your computer with a DSR partition, you cannot restore. If you have deleted the DSR partition, you cannot restore. In these cases, you may still reinstall if you have the reinstallation media, but that is a different topic than what is being covered here. If a DSR partition does not exist, you cannot create one and hope a backup image will magically appear in it.
If Dell shipped your computer with a DSR partition and it has not been deleted, then you should have the backup image to restore from--although you might not always be able to get to it.
The Dell-specific Ctrl+F11 process is supposed to completely automate the restoration process, returning the hard disk to the state it was in when Dell shipped the computer.