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
    2024-10-19T23:47:03+00:00

    I do have a wd external hard disk

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  2. Anonymous
    2024-08-05T20:48:14+00:00

    According to Microsoft: Microsoft does not recommend that you delete drivers to attempt to restore this setting.

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  3. Anonymous
    2024-07-17T02:32:42+00:00

    This did not work for me. In your step 3, I found the published name as <oem24.inf>. I deleted this driver as per your instructions and restarted. But still I cannot turn on Core Isolation. I still get the message of incompatible driver(s), except there aren't any drivers listed. The space where before <wdcsam64_prewin8.sys> appeared is now just empty.

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  4. Anonymous
    2024-07-15T15:41:51+00:00

    My Bluetooth also seemed to have mind of its own as to when it would actually even show up to work. Thanks for being more on the ball than evidently anyone at Microsoft even cares to attempt to be.

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