I keep getting "Save Keep" pop-ups.. help!

Hello,

So, for starters, I would like to put out there the fact that I am not all-knowing in the world of computer terminology and whatnot, so pardon my ignorance, per se? Alright, so I believe due to my downloading the application "Paint Brush" (A product of softonic... I've heard bad things recently about them...whoops?), I have been getting weird ad things popping up all over the place, a lot of them associated with "Save Keep"... I mean, it's gotten so bad that literally, I was watching a tv show on Hulu the other day and halfway through my program, my computer magically redirected itself to some ad website.. I lost my place and everything. This is infuriating!!

So my question is, (1) is this a virus/threat to my system, (2) if it is a virus type thing, is it the type that reads my emails and steals my passwords and internet identity?!?!?!? and (3) does anyone know how to get rid of it?

Thank you!