Launch an executable from Unreal

I’m trying to run an executable in unreal without pulling up C++, is there an event or easy means to accomplish this?
If it has to be C++ is there an simple example of this? (For a none programmer, extremely new to this)

I’m trying to make it so that an executable is opened whenever a player interacts with a painting in game, this has proved to be far more difficult than I imagined, the executable is a simple paint program, designed to run until it ends.

Launches full screen, I just want it to run the executable to completion then go back to unreal, any help would be greatly appreciated.