I was getting alot of strange downloads and …it led to Popups and all these messages that My system was going to crash seemed to OPEN a GATE to every PC media and spyware antivirus add on the internet.I have now downloaded COMODO and hope it can get this crud under control…Am I hoping for too much?
Follow this link for a step by step guild as this works for most people, carefully written by the Chiron
https://www.techsupportalert.com/content/how-clean-infected-computer.htm#main-content
If your stuck, or this guild don’t work. Feel free to ask 
Honestly, I would start with a scan by Malwarebytes. It has excellent removal capabilities.