Microsoft Defender to Update Post Windows 10 Support

17 Oct 2025

Microsoft has announced that its Defender Antivirus will continue receiving updates on Windows 10 even though official support for the operating system has ended. Updates and new virus definitions will be provided through October 2028, ensuring that these PCs maintain a level of defense.

Ongoing Updates for Defender

Microsoft clarified that the built-in Microsoft Defender Antivirus, part of the broader suite of security features, will continue to receive updates aimed at providing detection and protection capabilities. The updates will include the latest virus definitions until October 2028.

  • Microsoft announced support continuation for Defender until 2028.
  • Updates will include virus definitions and detection capabilities.
  • Support applies to older systems and legacy hardware.

Limitations of Relying Solely on Defender

Despite these updates, both Microsoft and security experts warn that Microsoft Defender should not be relied upon as the sole security measure. Without the regular monthly security updates previously provided during the OS's support phase, vulnerabilities may remain unpatched, posing increased risks over time.

Microsoft advises users to take advantage of the free extended support offered for an additional year, rather than depending entirely on antivirus updates, which may not fully mitigate risks associated with unpatched security vulnerabilities.

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