To enable Memory integrity, open Windows Security > Device security > Core isolation details, then switch on Memory integrity. The setting is also known as Hypervisor-protected Code Integrity (HVCI) and requires hardware virtualization to be enabled in UEFI or BIOS.
What Memory integrity does
Memory integrity uses hardware virtualization to create an isolated environment that helps protect kernel code. This makes it harder for malicious programs to use low-level drivers to hijack a PC. Windows 10 and Windows 11 support the feature, but the Core isolation page and its controls can vary by Windows version and installed hardware. Microsoft’s Device security guidance describes the feature and its location.
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Enable Memory integrity
- Open Windows Security. You can also go through Start > Settings > Privacy & security > Windows Security > Device security in Windows 11. Windows 10 may use different top-level Settings labels.
- Select Device security, then open Core isolation details.
- Find Memory integrity and switch it on.
- Restart the PC if Windows asks you to. The change takes effect after a restart.
If Memory integrity will not turn on
Check hardware virtualization
Memory integrity requires hardware virtualization to be enabled in UEFI or BIOS; many PCs already have it enabled. To reach UEFI from Windows, use Settings > System > Recovery > Advanced startup > Restart now. In Windows 10, the route is Settings > Update & Security > Recovery. From the advanced startup options, choose the option to enter UEFI firmware settings. The exact firmware screens and steps vary by manufacturer, so follow the PC maker’s instructions. See Microsoft’s Windows recovery options.
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1Fix the driver behind crashes, sound loss and screen glitches2Clear out junk files and repair common Windows errors3Scan for outdated or missing drivers - takes under a minuteResolve an incompatible-driver warning
Windows may identify a driver that cannot work with Memory integrity. First check Windows Update or the device or driver manufacturer for a compatible update. If no compatible driver is available, Microsoft says you may be able to remove the device or the app that uses it. Do not delete driver files manually; Microsoft’s guidance does not recommend that as a fix. Microsoft’s Memory integrity and Core isolation guidance covers driver compatibility.
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When to switch Memory integrity off
If an essential device or app depends on a driver Windows blocks, switching Memory integrity off may allow that driver to load, but it reduces this security protection. The affected device or app may still not work as expected. On a Secured-core PC, disabling Memory integrity takes the device out of its Secured-core state. The setting change takes effect after a restart. Prefer a compatible driver update or removing the affected device or app when practical, rather than leaving the protection off.
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