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

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments
Answer accepted by question author
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.

Was this answer helpful?

400+ people found this answer helpful.
0 comments

168 additional answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2022-12-19T17:21:57+00:00

    This happened when windows 11 installed. I have tried several times to search for devices by driver. Not possible to do the search.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2022-12-19T16:33:02+00:00

    Easiest way I've found to get rid of that driver is to go into the Devices window and change the view to "Devices by Driver" then you can scroll through until you find the offending driver.

    Was this answer helpful?

    0 comments
  3. Anonymous
    2022-12-18T20:14:32+00:00

    Hi,

    I did what that post said, and I got this response:

    Published Name: oem35.inf

    Original Name: wdcsam.inf

    Provider Name: Western Digital Technologies

    Class Name: WD Drive Management devices

    Class GUID: {8496e87e-c0a1-4102-9d8d-bd9a9b8b07a9}

    Driver Version: 11/30/2017 1.2.0.0

    Signer Name: Microsoft Windows Hardware Compatibility Publisher

    PS C:\Users\dudle> pnputil /delete-driver oem35.inf

    Microsoft PnP Utility

    Failed to delete driver package: One or more devices are presently installed using the specified INF.

    PS C:\Users\dudle>

    I can't find a way to respond to THAT post, so I'm replying to this one hoping someone can help. I wonder how I can find the devises that use this INF?

    Thanks for any help,

    Smitty

    Was this answer helpful?

    0 comments
  4. Anonymous
    2022-12-18T18:27:55+00:00

    I recently upgraded from Windows 10Pro to Windows 11. I did not get this message until after the first time I used my external hard drive to back up my system. Western Digital is that external hard drive.... I believe this driver was loaded upon plugging in the drive and is needed for that drive. Outside of that message of an incompatibility, I have not had any issues with the computer, except for that "memory" integrity issue...I don't know that if that protection was ever turned on in the first place......

    Was this answer helpful?

    0 comments