Pop Up Suggesting Virus Scan!

Windows 10 with Edge.
A week or two ago I contacted a Facebook help site to resolve a problem. Short version....I allowed him to install 'Chrome' to complete an online form.....He took over my PC and connected to 'Coinbase' as he suggested I would have to pay $50 but would get an immediate refund....True but no actual transaction. That all worked OK and I had reasonable precautions.
Now yesterday I am receiving pop ups...first from 'Coinbase'....they have now stopped and replaced by the image attached which I see is a Porn site which I have never visited.
I use F-Secure suite and did extra full scan....Scanned with Adwcleaner...scanned with Malwarebyts free...….. I do all three as a routine on a regular basis.
None indicate any problem.
Help Please.
Image at bottom right corner of screen appears a number of times.

PS. I have not clicked it!
https://i.postimg.cc/bw14YMC9/Intrusion.jpg

 

Further....
The pop ups are appearing via Windows Edge Notifications...I have turned off notifications for the time being!

 

You need to go here.
And follow these instructions.
Read & Run Me First Malware Removal Guide

 

I already use, and have run AdwCleaner and Mawarebytes so presumable I need only to download and run the other three suggested programmes?

 

You'll have to also post the logs of Malwarebytes and Adwcleaner.

 

Do I post the files here or in the next forum?

 

Start a new thread and post all the logs over here.
Malware Help - MG (A Specialist Will Reply)

 

Eldon I have just been told (a friend) that it is a 'Browser push notification'
A quick Google search indicates this is correct and I have removed the offending site from the allowed list in my browser.
Sorry to be a nuisance....after doing all the scans as well!!
I will wait a while to see if it appears again.

 

Thanks plodr I do appreciate your advice and would normally agree and certainly not recommend it! However it is only the second time I have done this since computers were invented and once, or twice, in a lifetime I take a calculated gamble.

 

There are so many ways to get caught out but the older I get the less tech savvy I get. The plus side is that I get slower which makes me concentrate and look more carefully at what I am doing!