Reset to factory settings help!

Hello,
I have a Toshiba Satellite A135-S4656 with Vista installed on it. I've had it a while, and I'm trying to reset it to factory settings, but I can't figure out how. I've gone through the usual control panel system options, and there doesn't seem to be one on the computer itself. I've already tried the Zero while powering on method, and even though I got the beeping noise at startup, I never received any kind of "Warning" screen or any other prompt for restoration of my system. I then tried the F8 method, and even though I was brought to a screen with several options on system restore, none of them involved factory reset, without a disc (which I don't even have).

I've still been looking through tons of Google results on this, but have yet to come up with anything that has worked, including on the archives of this site. Any help would be appreciated.