My grandson and EEvent Manager

Please tell me how I can get rid of the box in reference to EEvent Manager that keeps popping up on my computer every time I log into it. My grandson obviously was using it but he is no longer living here. Everytime I log on to my computer I get this box that pops up about EEvent Manager do I want to allow it or deny it!! How can I get this to keep popping up??

Just remove the application from your computer. Drag it into the trash and empty the trash.