Core Isolation Memory Integrity fails if the wdcsam64_prewin8.sys driver turns it off. However, you can fix this issue effectively by following the solutions in this article.

Wdcsam64_prewin8.sys turned off Core Isolation is a common problem many Windows users experience. However, you can fix this error effortlessly. All you need to do is read this article from beginning to end with the utmost attention.

This write-up is going to guide you through the best possible solutions to the problem. However, before discussing the solutions, allow us to shed some light on this error and its causes to help you troubleshoot better.

What Is Wdcsam64_prewin8.sys Turned Off Core Isolation

Core Isolation is a Windows security feature that provides your computer with added protection from malware attacks by separating the computer processes from the operating system and device.

Most often the error you are experiencing occurs because the Wdcsam64_prewin8.sys driver (a driver that gets installed on your computer if it has any Western Digital hard disk drive or other devices from Western Digital Technologies installed) is outdated, corrupt, incompatible, or missing. In addition to the driver issues, the following factors may contribute to the problem.

Causes of the error

Besides driver issues, the following factors may be responsible for the Core Isolation Memory Integrity error you are trying to fix.

• Your computer has corrupted system files
• There are pending operating system updates

Now that you are familiar with the issue, let us walk you through its tried and tested fixes.

Fixes for Wdcsam64_prewin8.sys Turned Off Core Isolation Error

You can solve the problem you are experiencing in the following ways.

Fix 1: Uninstall and remove the problematic WD driver from the driver store

The error you are trying to fix may have resulted from a corrupted WD storage device driver. Hence, uninstalling and removing the driver can solve the problem. Here are the detailed steps to perform the driver uninstallation and removal.

• First, you are required to power off the system and connect all hardware, particularly the WD storage device used with the computer.
• Next, power on the computer and use an administrator account to log into the system.
• In this step, right-click the Windows icon on the taskbar and select Device Manager from the on-screen Quick Access menu.

• After opening the Device Manager, choose View from the on-screen window.
• You can now select the option to Show hidden devices from the View menu.

• Now, double-click the WD Drive Management Devices category to expand it.
• Next, right-click WD SES Device and choose Uninstall device from the options available in the context menu.
• Delete the driver software for this device and Uninstall the device.

• Repeat the above steps to disable WD devices in the Storage Controllers, Other Devices, and Disk Drivers category.
• You can now right-click the Windows icon and select Apps and Features from the available options.

• Now, find and uninstall WD applications, such as WD Backup, Smartware, etc.
• In this step, you are required to right-click the Windows icon and select File Explorer from the available options.
• You can now navigate to the C:\Windows\System32\DriverStore\FileRepository\wdcsam.inf_amd64_7ce69fc8798d6116 path.
• In this step, you are required to take complete control of the wdcsam64_prewin8.sys file. The following note explains how to do it.

Note: You can follow these steps to grant your user account ownership of the wdcsam64_prewin8.sys file.

1. Input cmd in Cortana, right-click Command Prompt and choose Run as administrator from the context menu.
2. You will now be asked for permission to open Command Prompt as an administrator, click Yes to proceed to the next step.
3. Input TAKEOWN /F “<filename>” in the Command Prompt window and press Enter. Please remember to replace <filename> with the name of the file you wish to take ownership of.
4. Next, input ICACLS “<filename>” /grant %username%:F in the Command Prompt window (please replace <filename> with the name of your file) and press Enter.

• You can now perform the wdcsam64_prewin8.sys file deletion and repeat the process for any other folders beginning from WDCSAM.INF in the FileRepository.
• Next, find wdcsam64_prewin8.sys in the File Explorer (with This PC selected in the File Explorer window) and delete all the files that appear in the search results.
• Lastly, check whether or not the issue is resolved. If the problem remains unresolved, you can try the below solutions.

Fix 2: Use the Autoruns utility to remove incompatible drivers

Autoruns utility from Microsoft allows you to manage all components of the system, such as registries, services, and drivers to solve various problems. This tool can also help you remove incompatible drivers that may be responsible for errors like the one we are fixing in this article. Thus, you can follow these steps to use it.

• The first step is to navigate to the download page of Autoruns.
• Secondly, choose to Download Autoruns and Autorunsc.

• You can now click Save in the Save As prompt to get the Autoruns.zip file downloaded on your computer.
• Click on the file after it is downloaded and then double-click Autoruns.exe.
• In this step, extract the Autoruns ZIP file and install the utility on your computer.

• After completing the installation, open the utility and navigate to the Drivers tab.

• You can now locate the incompatible driver in the Driver tab and right-click on it.
• Next, choose Delete from the right-click menu to delete the problematic driver.
• Lastly, you can try to re-enable the Core Isolation features.

Fix 3: Run a System File Checker (SFC) to find and repair the problematic system files

Since system file problems are another reason wdcsam64_prewin8.sys turned off Core Isolation, you can perform these steps to run an SFC scan to repair the system files.

• First, launch Command Prompt as an administrator on your computer.
• After opening the administrator Command Prompt, input sfc/scannow in the Command Prompt window and press Enter.

• Lastly, exit the Command Prompt window and restart your computer to complete the process.

Fix 4: Update the wdcsam64_prewin8.sys driver

Wdcsam64_prewin8.sys driver is essential for Core Isolation. You may experience problems like wdcsam64_prewin8.sys turned off Core Isolation if this driver is outdated. Hence, keeping this driver up-to-date is of utmost importance.

You can update this and all other problematic drivers automatically with a simple click using Win Riser, one of the best driver updaters. Win Riser updates drivers, backups and restores the existing drivers whenever needed, cleans junk, deletes invalid registries, removes malware, and has many other useful functions. Hence, you can navigate to the following link to download and install this software.

After installing the software, here are quick and easy steps to use it.

• First, wait for a couple of seconds until Win Riser scans your computer.
• Next, review the results and click Fix Issues Now to update drivers and solve all problems instantly.

• Lastly, reinstall your PC to complete the process and save the changes.

Fix 5: Download and install the wdcsam64_prewin8.sys driver manually

The manual download and installation of the driver have fixed the Core Isolation issue for some users. Hence, you can follow these steps to try this solution.

• First, download the driver setup file.
• Next, unzip the downloaded file and double-click it to begin the driver installation.
• Lastly, reboot your PC to complete the driver installation.

Fix 6: Update Windows

If automatic update is disabled, you may have missed crucial Windows updates that could have fixed the issue you are experiencing. Hence, here are the steps to update Windows to solve the problem.

• The first step is to press your keyboard’s Windows key.
• Next, input check for updates in the on-screen search text box and click the first result.
• In this step, click the Check for updates button to detect the available Windows updates.

• You can now download and install the updates available on your computer.
• After downloading and installing the available updates, restart your computer to save the changes.

Wdcsam64_prewin8.sys Turned Off Core Isolation Issue Fixed

One of the above solutions is going to enable the Memory Integrity on your computer, resolving the error you are struggling with. However, if you have any doubts, questions, or suggestions about this article, you can leave a comment in the comments section without any hesitation.