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
    2025-01-10T02:18:52+00:00

    My driver was oem54.inf. Removed it as described here and that solved the issue.

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  2. Anonymous
    2025-01-04T16:21:24+00:00

    My Surface is showing that filename is associated with another inf file. It says that oem43.inf is the problematic file/driver. I wasn't able to reenable memory integrity after removing 46 but I was after removing 43.

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  3. Anonymous
    2025-01-03T18:45:16+00:00

    I removed driver oem46.inf and restarted the computer, but I still have the error. It shows that the incompatible driver is oem22.inf.

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  4. Anonymous
    2024-12-11T23:03:58+00:00

    I am trying this. All is identical except the driver I removed was oem34.inf. Fingers crossed!

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