New Member and iHeart App

Hi, My name is Tom and I’m a New Member here. Yesterday I received an iHeart and a request to apply iHeart App to my computer. I’m fairly new to the computer game. Well I have Yahoo and iHeart is trying to take over my computer. I have uninstalled it and told Yahoo to not allow but all kinds of funny things are happening. NOW WHAT??? tskau

What funny things are happening? What exactly is iHeart?