Turn On or Off Core Isolation Memory Integrity in Windows 10  

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  1. Cliff S's Avatar
    Posts : 22,898
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       28 Oct 2018 #120

    purplenate26 said: View Post
    When I try to turn this on, it just immediately turns off. How do I get it to stay on? Nothing I do seems to make it stay on. I turn it on and reboot and it's off! Any ideas? I have virtualization turned on in the BIOS. I can take photos of my BIOS if need be.
    Brink said: View Post
    Hello purplenate26,

    Does it do the same when using the .reg method in Option 2?
    Just a reminder, some drivers can and will prevent Core Isolation from working, like ancient AMD, some WiFi card drivers, anti virus drivers, and other software drivers:
    Windows Defender System Guard: Making a leap forward in platform security with memory integrity - Microsoft Tech Community - 167303

    Application compatibility
    While hypervisor-protected code integrity compliance has been a requirement for all drivers since Windows 10 Anniversary Update (1607), some drivers may still not be compatible. This may cause devices or software to malfunction. Such issues may occur after Memory integrity protection has been turned on or during the enablement process itself. If you’re an application developer and want to validate if your drivers and software packages are compliant with memory integrity, you can follow the steps outlined here.
    We worked hard to mitigate impacted experiences, so if an incompatibility exists for a boot-critical driver, Memory integrity protection will be silently turned off. If you encounter incompatibilities with other apps, Microsoft advises that you check for updates for the specific app and version encountering the issue before turning off memory integrity protection. The following links show some examples of commonly-used APIs that cause executable memory to be allocated, along with some example fixes:
      My ComputersSystem Spec

  2.    28 Oct 2018 #121

    purplenate26 said: View Post
    When I try to turn this on, it just immediately turns off. How do I get it to stay on? Nothing I do seems to make it stay on. I turn it on and reboot and it's off! Any ideas? I have virtualization turned on in the BIOS. I can take photos of my BIOS if need be.
    I had this bug thanks to MS. You need to use the reg file method mentioned in this tutorial.
      My ComputersSystem Spec

  3. purplenate26's Avatar
    Posts : 35
    Microsoft Windows 10 Pro 64 Bit
       28 Oct 2018 #122

    Hi guys. Sorry for the late reply. I tried the .reg method and rebooted my computer and it broke my machine. My laptop says it no longer detects a boot device. So I called Dell and we went through all their pre-boot diagnostics testing and the BIOS still wouldn't see the SSD. It's strange that this would happen just as I would reboot after the .reg. I mean, my laptop is a Dell XPS 15 9560 from May 2017 and has been continuously updated through Dell and Microsoft. It's stock software and hardware.

    You don't think the .reg can break a hard drive do you? Dell is going to replace my hard drive for free in a couple of days. I think the technician comes to my house on Wednesday. It's probably just a coincidence that my hard drive disappeared from the BIOS and I applied the .reg at the same time. Next time I'll check on the Dell XPS forums and ask about this tutorial and see what other XPS owners and staff have to say about it.

    Thank you everybody for your quick reply. I'm sorry that I couldn't give you a resolution to my problem.
      My ComputerSystem Spec

  4. Brink's Avatar
    Posts : 35,254
    64-bit Windows 10 Pro build 18317
    Thread Starter
       28 Oct 2018 #123

    purplenate26 said: View Post
    Hi guys. Sorry for the late reply. I tried the .reg method and rebooted my computer and it broke my machine. My laptop says it no longer detects a boot device. So I called Dell and we went through all their pre-boot diagnostics testing and the BIOS still wouldn't see the SSD. It's strange that this would happen just as I would reboot after the .reg. I mean, my laptop is a Dell XPS 15 9560 from May 2017 and has been continuously updated through Dell and Microsoft. It's stock software and hardware.

    You don't think the .reg can break a hard drive do you? Dell is going to replace my hard drive for free in a couple of days. I think the technician comes to my house on Wednesday. It's probably just a coincidence that my hard drive disappeared from the BIOS and I applied the .reg at the same time. Next time I'll check on the Dell XPS forums and ask about this tutorial and see what other XPS owners and staff have to say about it.

    Thank you everybody for your quick reply. I'm sorry that I couldn't give you a resolution to my problem.
    The .reg file wouldn't have any affect on a hard drive.

    Please let us know how it goes after the hard drive is replaced.
      My ComputersSystem Spec

  5. Cliff S's Avatar
    Posts : 22,898
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       18 Nov 2018 #124

    @Brink,
    Hey Shawn here is an interesting tidbit:

    Since I installed my new 9900K, Core Isolation cannot be turned on
    I have made no software or driver changes, I just swapped out my 8700K for the 9900K(and deleted the 8700K from Device Manager too).

    It does have two built in hardware meltdown & spectre mitigations, so I wonder if it's that, as that side channel stuff has to do with memory and the CPU's cache levels, plus hyperthreading
      My ComputersSystem Spec

  6. Brink's Avatar
    Posts : 35,254
    64-bit Windows 10 Pro build 18317
    Thread Starter
       18 Nov 2018 #125

    Cliff S said: View Post
    @Brink,
    Hey Shawn here is an interesting tidbit:

    Since I installed my new 9900K, Core Isolation cannot be turned on
    I have made no software or driver changes, I just swapped out my 8700K for the 9900K(and deleted the 8700K from Device Manager too).

    It does have two built in hardware meltdown & spectre mitigations, so I wonder if it's that, as that side channel stuff has to do with memory and the CPU's cache levels, plus hyperthreading
    Hello Cliff,

    Interesting. I wonder if a clean install may allow it if it's an issue with just swapping processors.
      My ComputersSystem Spec

  7. Cliff S's Avatar
    Posts : 22,898
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       18 Nov 2018 #126

    Brink said: View Post
    Hello Cliff,

    Interesting. I wonder if a clean install may allow it if it's an issue with just swapping processors.
    On my system that's way too much work

    I am the "Install Once: Re-image as needed" type of user
      My ComputersSystem Spec

  8. Brink's Avatar
    Posts : 35,254
    64-bit Windows 10 Pro build 18317
    Thread Starter
       18 Nov 2018 #127

    Cliff S said: View Post
    On my system that's way too much work

    I am the "Install Once: Re-image as needed" type of user
    I'm always having to clean install with all the playing I do, but I keep a very default simple install anyways.
      My ComputersSystem Spec

  9. Cliff S's Avatar
    Posts : 22,898
    Win10 Pro, Win10 Pro N, Win10 Home, Win10 Pro Insider Fast Ring, Windows 8.1 Pro, Ubuntu
       18 Nov 2018 #128

    Brink said: View Post
    I'm always having to clean install with all the playing I do, but I keep a very default simple install anyways.
    For playing around I have my VM's, and checkpoints.
      My ComputersSystem Spec

  10. purplenate26's Avatar
    Posts : 35
    Microsoft Windows 10 Pro 64 Bit
       18 Nov 2018 #129

    Brink said: View Post
    The .reg file wouldn't have any affect on a hard drive.

    Please let us know how it goes after the hard drive is replaced.
    Hi. The hard drive, and the motherboard were both replaced by Dell under warranty, thank goodness. The new hard drive came with a Dell customized version of Windows 10, and I went with that. I went ahead, and tried using the GUI method. Nothing happened for a full minute after ticking the slider, then all the sudden the XPS started asking for UAC password prompt to change the setting. I entered my password, and rebooted the XPS and presto, it worked.

    For all Dell XPS 15 9560, and variants, when you use the GUI method, I would recommend that you wait a full 5 minutes after ticking the slider before you leave the page or do anything else. It might be just my computer, but the fact that it takes so long, I think might be a XPS gotcha, and lead people to believe that the GUI method doesn't work. Can the sticky mention that you might need to wait a few minutes after ticking the slider before anything happens.

    Thank you for the tutorial.
      My ComputerSystem Spec


 
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