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
    2023-01-13T06:15:11+00:00

    You're a legend! Thank you very much. You were so easy to follow compared to a youtube video I watched. All fixed thanks to you!!!!!!!!!

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  2. Anonymous
    2023-01-09T17:57:22+00:00

    This turned out to be a rabbit hole for me.

    -My problem was I would connect to a network (any network) but would not maintain internet connection.

    -was told to switch my network settings from private to public - did not resolve.

    -was told it was because core isolation turned off (which led to this feed) - did not resolve problem.

    On my own, found the Norton VPN had been turned ON. Turned it off - Success!

    (I was unable to get the WDCSAM64_PREWIN8.SYS to delete from my Surface Pro - but I don’t use that driver and it does not appear to interfere with any of my operations or system. ). Thank you

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  3. Anonymous
    2023-01-07T06:10:54+00:00

    While this was useful, I am still plagued with the problem now being that the list is blank.

    Again,

    therefore leaving me with nothing to remove and still unable to turn on core isolation.

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  4. Anonymous
    2023-01-06T02:47:09+00:00

    Hi All i recently had this issue and used the following youtube video to delete the driver!

    link: https://www.youtube.com/watch?v=5\_IBEGLRdLI

    hope this helps

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