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How to fix Un-allowed DMA capable bus/device(s) detected

Sylvia W Perry 20 Reputation points
2025-10-16T19:10:05.59+00:00

How do I fix this? "Failed automatic device encryption. Un-allowed DMA capable bus/device detected, TPM is not usable."

Microsoft Security | Windows Autopilot
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  1. Rahul Jindal 11,501 Reputation points
    2025-10-16T19:50:55.4066667+00:00

    I wrote 2 blog posts on this very issue. Here is a link to one of the posts. Hope it helps.

    https://rahuljindalmyit.blogspot.com/2021/08/fixing-dma-requirement-for-silent-and.html

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