Memory Integrity is a Windows security feature that uses Virtualization-Based Security (VBS) to ensure only trusted code runs in kernel mode. Vanguard depends on this feature to create secure, hardware-enforced boundaries that block unauthorized modifications. When HVCI is turned off, either manually by the user or due to incompatible drivers Vanguard cannot validate the system’s integrity, resulting in this error.
This error is often caused by disabled Memory Integrity settings or driver incompatibilities (commonly older GPU, storage, and network drivers). It can also be triggered by conflicting Windows features like Windows Sandbox, Hyper‑V, Windows Hypervisor Platform, or Virtual Machine Platform. These features don’t always disable HVCI directly but may reserve virtualization resources, preventing HVCI from running correctly on some systems. Before proceeding, make sure your drivers are updated to HVCI-compatible versions. Outdated or legacy drivers are a common reason why Memory Integrity fails to enable. Also, ensure that Virtualization is enabled in your BIOS, since HVCI relies on virtualization support at the hardware level.
How to Enable Memory Integrity
Don’t See the Core Isolation Option?
If the Core Isolation section is missing, your system may not support VBS or it may be disabled via Group Policy. You can check compatibility using Microsoft’s Device Security documentation.
Final Step: Reinstall Vanguard (If Needed)
If Valorant still doesn’t launch after enabling HVCI, reinstall Riot Vanguard:
Open Add or Remove Programs, uninstall Riot Vanguard, then relaunch Valorant to reinstall it automatically.Alternatively, use Riot’s Repair Tool in the Riot Client.
