|This post discusses that nuisance; how it arrives, and how to get rid of it.|
Download and run ccleaner which is one of the utils recommended; and would have been one of my first choices too.
If you can't boot successfully into the normal desktop, try safe-mode, and run ccleaner from there.
Use the custom/manual install option, NOT the automatic. Using the automatic option means you acquire all manner stuff you neither need nor want. And as you have discovered much of it is a real pest, and a PIA to eradicate.
Always use custom/manual install option for anything downloade off the web. Carefully watch for and uncheck anything "so helpfully pre-checked and offered for your convenience". Ensure only the item "you" want is installed.