and I have attached a screenshot of the pop up to the post.
No screenshot is attached?

Blacklisted URL
https://virustotal.com/en/url/aaac62d8a5589f01e95e14f0350b7ada2a6ba2bf5f6fa0662412acb8d372df30/analysis/1500987440/

Dr.Web info: known infection source/not recommended site
Websense ThreatSeeker: hacking. potentially unwanted software

Try run AdwCleaner >> https://www.malwarebytes.com/adwcleaner/

Malware experts is notified and will check your logs when online