Alright guys have any of you ever heard of any sort of windows protection software that lets you use customisable backgrounds etc?

What am looking for is some kinda software where i can set it running when am away from comp and it fills full screen - only way to get beyond it is with password (obviously loads on startup as well) but you can customise what it looks like - i dont need mega security just enough to keep people from prying.....alot of you maybe thinking well a password protected screensaver but i want something that plays different animations depending on wether or not the correct password is entered.......

anyone heard of anything like this???

v_Ln