Kindly try this.
Open Device Manager, click View > hidden items.
Locate WD device under WD Driver Management Devices/WD SES Device USB Device.
Right click, select Uninstall.
Restart your system.
Let us know if this helps!
Cannot turn on Memory Integrity
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Annie Baxter
0
Reputation points
Windows 11 security update fails. Memory Integrity will not turn on due to core isolation issue caused by wdcsam64_prewin8.sys driver. I went through all the suggested steps to correct the issue, restarted system and retried Windows Update. It hangs at 0% download, eventually times out. Help! I am losing my mind. Trying to chat with an agent times out....HELP!
Windows for home | Windows 11 | Windows update
3 answers
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Kapil Arya 38,446 Reputation points Volunteer Moderator2026-09-11T08:13:37.79+00:00 -
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Ivan B 122.5K Reputation points Independent Advisor2026-09-11T03:25:41.53+00:00 Hii,
Do you have some Western Digital storage software or SanDisk installed if yes uninstall.
If you still get the error about this incompatible driver, download autorun from the link below, extract the x64 version and run it as administrator.
https://learn.microsoft.com/pt-br/sysinternals/downloads/autoruns
Go to the drivers tab and find the wdcsam64_prewin8.sy driver, right-click and delete it.
After removing it, do this: open the command prompt (admin) and run the commands:
sfc /scannowanddism /online /cleanup-image /restorehealth, wait for the process to finish and restart the computer.Restart the PC After activating it, restart again.
Please consider rating the question (accepting the answer or not) and visiting the Microsoft Q&A community if you have further questions.
Thanks.
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AI answer
2026-09-11T02:49:25.23+00:00 wdcsam64_prewin8.sysis an incompatible driver, and Memory integrity will stay off until that driver is updated or removed.Try this end-to-end path:
- In Windows Security go to Device security > Core isolation details > Memory integrity.
- Confirm the blocked driver shown is
wdcsam64_prewin8.sys.
- Confirm the blocked driver shown is
- Update or remove the driver.
- Microsoft guidance is to check with the device manufacturer for an updated compatible driver.
- If no compatible driver is available, remove the device or app that installed that driver.
- If the driver still appears after uninstalling the related app, remove the driver package from the driver store.
- Open Windows Terminal (Admin).
- List third-party drivers:
dism /online /get-drivers /format:table - Find the published name for the related driver package, such as
oem13.inf. - Remove it:
pnputil /delete-driver oem13.inf /uninstall /force - Restart the PC.
- Try turning Memory integrity on again.
- Path: Windows Security > Device security > Core isolation details > Memory integrity.
- If Memory integrity still will not enable, check whether Windows blocked the driver load.
- Open Event Viewer.
- Go to:
Applications and Service Logs\Microsoft\Windows\CodeIntegrity\Operational - Memory integrity compatibility events are generally Event ID 3087.
- Verify whether Memory integrity is actually enabled.
- Check System Information (msinfo32) under Virtualization-based Security Services Running, or check the Core isolation page again.
- If the system became unstable after enabling Memory integrity, use recovery only as a last resort.
- Risk: registry changes can affect boot behavior.
- In Windows Recovery Environment, the documented command to turn Memory integrity off is:
reg add "HKLM\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity" /v "Enabled" /t REG_DWORD /d 0 /f
About Windows Update hanging at 0% download: the provided material only supports the Memory integrity and incompatible-driver side of the problem. The supported fix here is to remove or update the incompatible driver first, restart, then retry enabling Memory integrity and retry Windows Update.
References:
- Device Security in the Windows Security App
- Enable virtualization-based protection of code integrity
- Memory integrity and VBS enablement
- incompability with memory integrity - Microsoft Q&A After installing the latest 24H2 update, I received a security warning. It informed me that a device driver was not compatible with Windows memory integrity. I needed to update the driver for the device in question, but there was no better update available. I then removed the device itself, including the driver for that device via Device Manager. However, this did not solve the problem. I can no longer enable memory integrity. When trying to enable it, I am alerted to the incompatibility of that specific driver. But I can update that driver anymore. I removed it.
AI-generated content may be incorrect. Read our transparency notes for more information. - In Windows Security go to Device security > Core isolation details > Memory integrity.