How do I system restore my Dell Inspiron 13z to factory settings? [Option Not available in Dell DataSafe and Local Backup]

Dear All, 

I am looking to system restore my Dell Inspiron 13z laptop to factory settings. I have read through many guides, other posts, and the manual for this computer however I am incapable of finding the necessary solution.  My Dell DataSafe and Local Backup does not provide the option to restore to factory settings.  The tab is there, however it is not clickable.  If there is anybody who can kindly help me with this I would not be able to thank you enough! 

Basic Specifications of my 13z include Windows 7 Home Premium 64 Bit. The system model is Inspiron 5223 and my DirectX version is DirectX 11.