Welcome to Android Central forums. I'm a bit confused and it sounds like Spook might also have some questions that we really need to address before guessing at what can help. Well to avoid guessing.
When you say capture we're assuming screen capture but do you mean video capture, from the feature in your quick settings menu, a regular screenshot or something else?
When you say you've disabled it but it returns, please explain how you are disabling it, and how you know it returns?
Again we're left to assume, but do you just mean that you're noticing screenshots after you open your device?
I will go out on a limb here with some assumptions based on other questions we've seen about Samsung and screenshots. Samsung has a feature that allows you to take screenshots by swiping your palm across the screen. This can be disabled and unless your device is buggy it is not known to turn itself back on? Is this what you're referring to? The easiest way to find this is to type palm in the search bar of your settings menu. As
@SpookDroid mentioned there isn't a way to disable the push button method but if you're sliding it in and out of a pocket and don't have touch sensitivity turned on it is very possible to capture unwanted images.
Outside of this advice we would need more information. Provide some details and we'll provide more help.
Facebook
Twitter
Instagram