I live in Toronto, Canada and I keep getting calls telling me that they are calling from 24 hour support.  The claim that they are getting error messages from my laptop and want to help me fix the issue.
They wanted me to turn on my computer to go through the steps.  I asked them to give me the steps and I will check the computer at a latter time.  They did not want to do that.  They insisted that I have to follow their directions while I am on the phone with them.
It sounded like a scam to me.