If you get a message that you have to call a phone number to ‘clean your system’ just immediately power down
If you do not get any error on power up then you are probably OK
If you want to PREVENT ever getting one then install FREE HOME VERSION of avast anti-virus and malwarebytes
If you don’t have AT LEAST Those two, you are too stupid to use a computer and you should log off right now.
Never used an anti virus and have never had a virus or malware. Two reasons, I suppose:I don’t go to p0rn sites and I use a Mac. Everything is backed up several different ways anyway.