I went to a site from search and clicked on a music file. I saw a small flash at the side of my monitor like a very fast download. Next a voice came through my computer speakers and said that my computer had been compromised. I then found a pop up on my screen instructing me to call microsoft at the number on the screen. I did not touch anything but used the task manager to close the site and pop up.
I use pcmatic Evergreen and also keep malwarebytes pro on my computer to run manually. I use windows firewall and supershield. I ran extensive scans but nothing turned up.