How to fix
Core Isolation Memory Integrity “Page not available” error
on Windows

There's a notification from Windows Security indicating recommended actions. When accessing Windows Security, it alerts that Memory Integrity is turned off. However, attempting to navigate to the relevant settings results in a "Page not available" message. Any tips on this would be appreciated.

Core isolation and Memory Integrity are critical components of Windows security, designed to protect the system against malicious software by restricting access to the system's core processes.

Core isolation acts as a safeguard, offering an additional layer of security by separating certain functions of the operating system into a virtualized environment. Memory Integrity, a subset of this technology, ensures that code running in the kernel is trustworthy and prevents attacks from inserting malicious code into high-security processes.

Despite the robust protection these features offer, some users may encounter a "Page not available" error when attempting to enable Memory Integrity. This error can be frustrating, as it hinders the activation of a key security feature.

The "Page not available" error typically arises from a system bug that prevents the security settings page from functioning properly. If you're facing this issue, a logical first step is to ensure that your Windows is updated to the latest version. Microsoft frequently releases patches and updates that can resolve such bugs.

Nonetheless, an update may not always rectify the problem. This doesn't mean you're left without options. It's important to recognize that the path to resolution may require exploring other adjustments within your system's settings. This may involve reviewing driver compatibility or checking for software conflicts that could be preventing the proper display of the Memory Integrity setting.

While it's inconvenient when technical issues like the "Page not available" error arise, they often signal a discrepancy within the system that requires attention. For those who prefer an automated solution, the use of a PC repair software like [d1] can often address underlying Windows issues, simplifying the process of securing your system with core isolation and Memory Integrity.

Fix 1. Install all available Windows updates

Installing the latest Windows updates can fix the "Page not available" error when enabling Memory Integrity. Updates often include patches for bugs and compatibility improvements that could be causing the issue. Ensuring your system is up-to-date is crucial for maintaining security and functionality.

• Click on Start and select Settings.
• Choose Update & Security.
• Click on Windows Update.
• Select Check for updates.
• Install any available updates, including optional ones.
• Restart your computer after the updates are installed.

Fix 2. Run SFC and DISM

SFC and DISM are built-in tools that can repair Windows system files and restore system health. Running them can fix underlying issues preventing Core Isolation Memory Integrity from being enabled.

• Type in cmd in Windows search.
• Right-click on Command Prompt and select Run as administrator.
• When User Account Control asks you whether you allow changes to your system - click Yes.
• In the Command Prompt window, paste the following command and hit Enter:
  sfc /scannow
• Next, use the following commands, pressing Enter after each:
  Dism /Online /Cleanup-Image /CheckHealth
  Dism /Online /Cleanup-Image /ScanHealth
  Dism /Online /Cleanup-Image /RestoreHealth
  (Note: if you get an error executing this last command, add /Source:C:\RepairSource\Windows /LimitAccess to it and try again).
• Reboot your computer.

Fix 3. Enable TPM in BIOS

The Trusted Platform Module (TPM) is a hardware requirement for Core Isolation Memory Integrity. Enabling TPM in the BIOS can resolve the error if it's currently disabled.

• Click on Start and pick Settings
• Next, go to Update & Security > Recovery > Advanced Startup > Restart now.
• After a restart go to Troubleshoot > Advanced options > UEFI Firmware Settings > Restart.
• These settings can also be found in the submenu in BIOS under Advanced, Trusted Computing, or Security sections.
• Look through the options and enable TPM.
• Once done, reboot your system and try upgrading.

Fix 4. Enable Secure Boot in BIOS

Secure Boot is a security standard that ensures only trusted software is loaded during the system start-up. Enabling it in the BIOS can help with the Memory Integrity feature.

• Access the Advanced Startup option as explained above and enter the BIOS setup.
• Look for the Boot tab.
• Find the Secure Boot option and enable it.
• Save and exit the BIOS settings.

Fix 5. Enable Virtualization in BIOS

Virtualization technology allows the CPU to act as if you have several independent computers, it's essential for features like Core Isolation to work properly.

• Access the BIOS setup.
• Locate the CPU-related settings.
• Find the Virtualization option (it may be named VT-x, AMD-V, SVM, or similar).
• Enable this setting.
• Save your BIOS changes and reboot your system.

Fix 6. Use Windows Registry to enable Memory Integrity

Editing the Windows Registry to enable Memory Integrity can bypass the 'Page not available' error, but it should be done with caution as incorrect changes can cause system instability.

• Type regedit in Windows search and hit Enter.
• When UAC shows up, click Yes.
• Go to the following location:
  HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\DeviceGuard\Scenarios\HypervisorEnforcedCodeIntegrity
• If HypervisorEnforcedCodeIntegrity does not exist on the left side of the window, right-click on Scenarios and pick New key, naming it HypervisorEnforcedCodeIntegrit.
• On the right side of the window, right-click on an empty space, pick New DWORD (32-bit) Value, and name it Enabled.
• Double-click it now and set the Value data to 1.
• Click OK and close down Registry Editor.
• Restart your PC.

Other related topics you might be interested in:

• How to fix can't turn on Core isolation - Memory integrity in Windows?
• How to fix "A driver can’t load on this device" error in Windows?
• How to fix memory integrity is off because of incompatible drivers in Windows?