Determining if a "Microsoft alert message" is a scanm; Please reply ASAP

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  The message says:

  "Your computer has been blocked

  Error @ 268D3

  Please call us immediately at +18882589654

  Share your Computer ID (69286); Do not ignore this critical alert; If you close this page, your computer access will be disabled to prevent further damage to our network. You must contact us immediately so that our engineers can walk you through the removal (of virus and spyware) process.

  Is this legit?

  Urgent!

  Sunday, September 10, 2017 7:12 PM