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I received a message that says my computer is locked and I should call 866-491-5121. Is this a legit phone number for Windows Defender?

Janet Sepanik 20 Reputation points
2025-09-04T18:13:00.0366667+00:00

How do I know if 866-491-5121 is a legit phone number for Microsoft Defender. And is my computer really disabled.

Microsoft Security | Microsoft Defender | Microsoft Defender for Office 365
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  1. Andy David - MVP 159.9K Reputation points MVP Volunteer Moderator
    2025-09-04T18:16:00.3233333+00:00

    No, do not call any number like that or respond or click on any text message or something surfaced on your workstation.

    1 person found this answer helpful.

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