My husband has been in the computer business for 50 years. One night I got this notice all of a sudden that I too had a virus and could not knock it out. He told me to unplug the computer and wait for a while. Sometimes, you have to wait til the next day before rebooting.
Actually, the company that is trying to get you to quick buy the security stuff is the one that has attached the virus to your computer. That is why you will get norton, or mcafee popping up a lot to get rid of it.
It is not this sight that is causing it, sometimes just takes ahwile before it hits. Could have come from anywhere.