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
    2023-04-10T05:38:11+00:00

    Windows tells me that they do not recommend removing the driver.

    ******@gmail.com

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  2. Anonymous
    2023-04-10T07:11:33+00:00

    I already removed the driver oem12 or whatever it is called. This is so frustrating and there doesn't seem to be a way to resolve this issue. Now my Dell XPS8930 is acting strangely. It keeps telling me to restart my PC now that memory integrity is "on." Chrome, Edge, etc. will not load links now.

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  3. Anonymous
    2023-04-10T07:34:43+00:00

    Dreadful. In my case I'm not certain that the problem is caused by this driver, but this is hte only thing Microsoft is telling me is wrong. What's happening to me is that for no apparent reason applications I am not running turn themselves on, then turn themselves on again a half second or so later until they just clog things up. Control-ALT- Delete does no good, so I have to pull the power to shut down and start again. Then my Dell PC runs fine for 15 minutes to a half hour, then the 20 pages of Quicken or My Documents or Word clog up the machine again.

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  4. Anonymous
    2023-04-12T21:15:00+00:00

    Thanks, I found the answer, too. But, Microsoft says to remove the driver if you want the Core Isolation security feature. Western DIgital should publish a fix for the problem. I don't think we need 1964 drivers on today's WIndows 11 boxes.

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