Microsoft is preparing to enable a Windows 11 security feature on more PCs, and while the change is good news for system security, it could come with a downside for some PC gamers.
The feature in question is Memory Integrity, also known as Hypervisor-protected Code Integrity (HVCI). Microsoft uses it to protect Windows from malicious drivers and attacks targeting the operating system kernel.
The company plans to begin enabling the protection on eligible Windows 11 devices through upcoming quality updates, starting in October 2026.
For most newer PCs, the performance impact may be small. However, gamers using older hardware could notice lower frame rates in certain games.
What is Windows 11 Memory Integrity?
Memory Integrity is part of Microsoft’s Virtualization-based Security (VBS) technology.
In simple terms, it creates an isolated environment using the Windows hypervisor. Code running at the kernel level has to pass additional security checks before it is allowed to execute.
That makes it considerably harder for malware to exploit vulnerable drivers or manipulate Windows at a low level. Microsoft describes Memory Integrity as an important part of hardening Windows against attacks targeting the kernel.
The security feature isn’t new. Windows 11 has supported and enabled Memory Integrity on compatible systems for years, particularly on clean installations and devices that meet Microsoft’s hardware requirements.
What’s changing is that Microsoft is preparing to expand automatic enablement through Windows quality updates on eligible devices.
Why gamers may care
The problem is that additional virtualization and security checks can introduce some performance overhead.
Microsoft itself notes that Memory Integrity works more efficiently on newer processors. Older CPUs can rely on additional emulation for some of the required hardware capabilities, resulting in a larger performance impact.
That doesn’t mean every Windows 11 game will suddenly lose a significant number of frames.
Instead, the impact depends heavily on the hardware, game and drivers involved. Some systems may see virtually no noticeable difference, while others could experience lower frame rates or performance inconsistencies.
This is particularly relevant for gamers who are already running close to the limits of their CPU.
Older PCs could feel the change more
This is where Microsoft’s move becomes interesting.
Modern Intel and AMD processors generally have hardware capabilities that allow Memory Integrity to operate more efficiently. Older processors don’t always have the same level of support, which can increase the overhead associated with the security feature.
So if you’re running an older Windows 11 gaming PC and suddenly notice a performance change after an update, Memory Integrity is one setting worth checking.
It’s also worth remembering that Windows gaming performance can be affected by many other factors, including graphics drivers, background applications, anti-cheat software and game-specific optimizations.
Microsoft won’t automatically turn it back on if you disabled it
There’s an important detail for gamers who have already manually switched Memory Integrity off.
Microsoft says the upcoming rollout will not automatically re-enable Memory Integrity on devices where users previously disabled it.
That’s a welcome distinction because users who deliberately changed the setting aren’t suddenly going to find their configuration reversed by the update.
However, PCs where the protection is eligible for automatic enablement and hasn’t previously been disabled could receive the change through Windows quality updates.
How to check Memory Integrity on Windows 11
If you’re curious whether the feature is currently enabled on your PC, Windows makes it relatively easy to check.
- Open Windows Search.
- Type Core Isolation.
- Open Core isolation from Windows Security.
- Look for Memory integrity.
- Check whether the toggle is enabled.
Microsoft places the setting under Windows Security → Device security → Core isolation details → Memory integrity.
Should you turn Memory Integrity off for gaming?
For most users, probably not.
Memory Integrity exists for a reason, and disabling it reduces the security protections Windows can provide against certain kernel-level attacks.
If you’re experiencing a measurable gaming performance problem and want to determine whether Memory Integrity is contributing to it, temporarily disabling the feature can be used as a troubleshooting step.
But it’s better to treat that as a test rather than a permanent gaming optimization.
Microsoft’s recommendation is to turn the protection back on after you’re finished gaming if you’ve disabled it to improve performance.
There’s also a driver compatibility angle
Performance isn’t the only potential issue.
Microsoft acknowledges that some applications and hardware drivers can be incompatible with Memory Integrity. In rare cases, compatibility problems can even lead to serious system issues such as a blue screen.
Microsoft specifically lists some gaming anti-cheat solutions among areas where HVCI compatibility has historically been an issue.
That’s why keeping Windows, graphics drivers, game clients and other gaming software updated remains important as Microsoft expands the rollout.
Windows 11 is becoming more security-focused
Microsoft’s decision reflects a broader direction for Windows 11: security features are increasingly becoming part of the default operating system experience rather than optional extras.
For Microsoft, enabling protections such as VBS and Memory Integrity by default helps establish a stronger security baseline across Windows PCs.
For gamers, however, the equation is slightly different.
A security feature that has little impact on a modern gaming PC may have a more noticeable effect on an older machine. That makes Microsoft’s October rollout something worth watching, particularly for players who care about squeezing every last frame out of aging hardware.
The bottom line
Memory Integrity isn’t a Windows 11 gaming killer, and most modern PCs shouldn’t suddenly become unusable for gaming because of it.
But the feature can carry a performance cost in some configurations, with older processors potentially seeing a larger impact. Microsoft is now preparing to enable it on more eligible Windows 11 PCs through quality updates beginning in October 2026.
If your gaming performance changes after the rollout, checking Core Isolation → Memory Integrity should be one of the troubleshooting steps on your list.
And if you do disable it to test gaming performance, remember that you’re trading away part of Windows’ security protection — so turning it back on afterward is the safer choice.
Stay tuned to WinCentral’s Windows 11 coverage for further updates, patch releases, and fixes as Microsoft rolls out solutions for these issues.
