Advanced setting is GONE for Restoring to Manufacturers Settings

A few months ago my computer , A Gateway SX2803-25e shut down on me as I was trying to restore it. The restore was almost complete when suddenly the computer just shut down. Since the restore wasn't finished, I couldn't get back into it no matter how many times I tried. I then took it into Best Buy where I bought it from a couple years previously but after I got it back, I tried unsuccessfully many times after having my computer fixed to find the advanced settings to restore my computer to Manufacturer's Settings just in case in the future I should need it but like I said, it was completely gone from the restore area of my advanced settings. I don't know if it was deleted by my computer when it unexpectedly shut down while trying to restore the system or if Best Buy removed it. But all I know is I cannot find it any longer. I go to my control panel, click on Backup and Restore; I go to Recovery Systems Setting on your computer which takes me to the advanced Recovery methods below the Open System Restore window. In the past I have used this several times and usually I find: Restore your Computer to Manufactures Settings. But not any longer does it show. Help anyone?