By john 
Virtualization-Based Security, usually shortened to VBS, is one of Windows 11’s more powerful protections and also its most debated, because it sits at the intersection of security and performance. If you have heard that a Windows setting can cost you gaming frames, VBS is usually what people are talking about. Here TANGKAS39 is what it does and how to think about the trade-off.
What VBS Does
VBS uses your processor’s hardware virtualization features to carve out an isolated, secure region of memory, separate from the main operating system. In effect, Windows treats its own core as an untrusted guest and walls off a protected area that malware running in the normal system cannot reach.
The most visible feature built on top of VBS is Memory Integrity, also known as HVCI (Hypervisor-protected Code Integrity). It checks that code trying to run in the sensitive kernel area is properly signed and trustworthy before allowing it, blocking a whole class of attacks that try to inject malicious code deep into the system.
The Performance Question
Here is the honest part. Because VBS and Memory Integrity add a virtualization layer that system operations must pass through, they carry a measurable performance cost. In gaming benchmarks, testing has commonly shown differences in the range of several percent, sometimes reaching around 5 to 10 percent or more depending on the game and hardware, with the impact most pronounced in CPU-heavy scenarios.
Modern processors include features that reduce this overhead, and newer Windows versions have improved it, but the trade-off has not vanished. Microsoft itself acknowledges the cost, and has allowed PC makers to ship performance-sensitive machines like gaming PCs with these features off.
Is It On for You?
Many new prebuilt PCs and clean installs of Windows 11 have VBS enabled by default. You can check by pressing Win+R, typing msinfo32, and looking at the Virtualization-based Security line in System Information. To see Memory Integrity specifically, open Windows Security, go to Device Security, then Core Isolation Details.
Should You Turn It Off?
This is a genuine trade-off rather than a clear right answer. For most users, the security benefit is worth keeping VBS on, since the performance cost is invisible in everyday tasks like browsing and office work. For dedicated gamers chasing every frame on a system they consider low-risk, disabling Memory Integrity via the Windows Security toggle can recover some performance.
The reasonable approach is to weigh how you use the PC: keep the protection on unless you have a specific, performance-critical reason to disable it, and understand that turning it off does lower your defenses against certain kernel-level attacks. It is your call, but it should be an informed one.