My step-dad is kind of dumb and downloads all sorts of things from the internet without putting any thought into it, so can anyone help me fix this dumb thing he did?
Anything I try to do with it, leads me to mail.ru.
Right click on it and see if you can disable it. As Deborah stated, post your add remove programs list. Finally you may want to use Malwarebytes to see if it’s malware.