Is it a scam? Probably.
We get a number of calls weekly, sometimes daily reporting that MICROSOFT says the computer is infected. DON’T TURN OFF YOUR COMPUTER – if you do all your data will be lost, your computer will be destroyed, kittens will die.
It’s a lie.
Here are some of the phone numbers reported for this particular scam:
888 316 8070
Microsoft does not call you. It’s not possible to call micorsoft unless you want to buy something.