Windows 10: Can't turn on HCVI Core isolation and IOMMO Vt-d at the same time

Discus and support Can't turn on HCVI Core isolation and IOMMO Vt-d at the same time in Windows 10 Software and Apps to solve the problem; I can't turn on Core Isolation HCVI and Vt-d IOMMO at the same time. When I turn on Vt-d, Core Isolation can't be turned on. When I turn on Core... Discussion in 'Windows 10 Software and Apps' started by Nghiệp Năng Huỳnh, May 17, 2025 at 1:48 PM.

  1. NGHIệP NăNG HUỳNH
    Nghiệp Năng Huỳnh Win User

    Can't turn on HCVI Core isolation and IOMMO Vt-d at the same time


    I can't turn on Core Isolation HCVI and Vt-d IOMMO at the same time. When I turn on Vt-d, Core Isolation can't be turned on. When I turn on Core isolation, Windows asks me to restart my PC and after I restart my PC, it's still off. But when I turn off Vt-d IOMMO, I can turn on Core - Isolation. How can I fix this

    :)
     
    Nghiệp Năng Huỳnh, May 17, 2025 at 1:48 PM
    #1
  2. QUIMBY
    Quimby Win User

    Core isolation and memory integrity - UEFI settings (vt-d)

    Hi folks.
    A week ago I migrated to Windows 10 from Windows 7 on a well aged ivy bridge system. So far everything went very well and I'm glad I finally made the step. I'm just "breeding" over a subject that I just can't seem to find any hard information about.

    Under "core-isolation" I activated the point "memory integrity", that wasn't activated after a clean install. It seems to work just fine. No problem whatsoever so far.
    I have vt-x and vt-d activated in UEFI and I understand that vt-x obviously is essential for this feature. But what about vt-d? Does Windows 10 utilize this feature in any way for security purposes or can it be disabled? (Or the other way round, does it have to be disabled for some reason I don't know.)
     
    Quimby, May 17, 2025 at 1:51 PM
    #2
  3. CLIFF S
    Cliff S Win User
    Cliff S, May 17, 2025 at 1:51 PM
    #3
  4. SLICENDICE
    slicendice Win User

    Can't turn on HCVI Core isolation and IOMMO Vt-d at the same time

    slicendice, May 17, 2025 at 1:51 PM
    #4
Thema:

Can't turn on HCVI Core isolation and IOMMO Vt-d at the same time

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