Core Isolation turned off due to WDCSAM64_PREWIN8.SYS incompatibility

Anonymous
2022-09-02T19:09:56+00:00

I have been running Windows 11 successfully on my Microsoft Surface for some time now with no problems.

Within the last day or so, I all of a sudden got a notification that Core Isolation has been disabled due to an incompatible driver, WDCSAM64_PREWIN8.SYS.

From what I can see, this driver is related to Western Digital. However, I do not have any Western Digital devices attached to my Surface, nor have I recently added/installed anything from Western Digital.

I have tried searching for this driver but have come up empty.

Surface | Surface Pro | Safety and security

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Anonymous
2022-11-28T10:37:21+00:00
  1. Select the Startbutton and type “Core isolation”.
  2. Select the Core Isolation system settings from the search results to open the Windows security app.

On the Core isolation page, you’ll find Memory integrity along with the toggle to turn it on

  • If you receive a notification / message says that the memory integrity can't be turn on follow the below steps.
  1. Try to scan and fix.
  2. If it is not solved, please click on "Review any driver incompatibilities".

3.We can see a driver or more.

  1. Please note the published name here is "oem46.inf"
  2. Select the Start button and type “Device Manager" and follow as shown below.

  1. Select the right driver from Device manager"oem46.inf" and right click and select remove driver.

Example :-

7. System needs to be restarted after removal of the driver.

Hopefully this will solve your issues no need to install any software for this.

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  1. Anonymous
    2023-03-03T11:43:44+00:00

    Win 11 pro, I managed removing the driver wdcsam64_prewin8.sys.

    1e In my case I was succesfull in tracing the incompatable driver.

    I now give the dutch messages I got.

    Go to "instellingen"'Than go to "privacy and beveiliging" than go to "windows beveiliging"

    Than click on "Apparaatbeveiliging", than see "kernisolatie" en you find a triangle in stead of a green approvel sign.

    click on it and ask for more information. The driver that is causing the problem will be shown.

    2e I tell you what I did.

    I went to device management and I choose in "beeld" for "stuurprogrammas op type" Than I picked out my wdc devices and I found the installed driver that I was looking voor.

    I removed the device wth the driver succesfull and everything looks fine to me.

    3e I went back to "Instellingen" .......... to "Kernisolatie" than turned all the items on

    I had to restart The computer and everything worked like it should.

    Sorry for the dutch in betweens " " I do not know the proper english terms. Maybee someone can translate them for you if you are interested.

    Using several shells (PowerShell and others) did not bring me any succes.

    K.R. and Goodluck.

    W. Klomp

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  2. Anonymous
    2023-03-07T09:02:56+00:00

    I got it resolved. I called customer services and they rectified the matter.

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  3. Anonymous
    2023-03-12T21:21:59+00:00

    Thanks for the heads up

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  4. Anonymous
    2023-03-31T19:49:49+00:00

    Same issue here as well

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