If you have found any that means they got in some how, many are completely benign and a good many were installed with your permission.
I could explain the hows but i don't have weeks of times to write the ins and outs of this stuff. Google the types you found and find out how you got them so you don't get them again.
Youlerntocomputers
Thank you obvious man, the sky is also blue you should tell everyone quick, it's news.