Called the number back anonymously and it's " not assigned " so just another unscrupulous SCAMMER using a  SPOOFED number. Checked a couple of other sites and found out that it's either the 'Microsoft' OR 'CRA' scam - like the flavor of the day I guess. Can't believe that people still fall for these ANCIENT scams - I didn't even own a computer when I first encountered the Microsoft scam ! You can thank our service providers,  our law enforcement agencies AND our respective Governments for DOING NOTHING about this nonsense...