I will check all those instructions I got from you, but this morning after turning on my computer in the morning, I already had Malwarebytes installed on my computer. Which apparently happened spontaneously - because I got a notification in the place responsible for notifications in windows :o
I managed to scan the system, but didn't check if there were any complications along the way ( in the sense of whether it took 20 seconds or 20 mins ) because I was out walking the dog.
But will still follow the recommendations just in case. And at this point I can already thank you for solving, in part, the problem.