Riot Games has announced Vanguard On-Demand, an update that allows its anti-cheat driver to load only when a Riot game is launched rather than at Windows startup. To use this mode, players must meet specific security requirements, including Windows 11 25H2 and enabled features like TPM 2.0 and Secure Boot, according to official company details.
How does Vanguard On-Demand change the anti-cheat process?
Since its 2020 launch with Valorant, Riot’s Vanguard anti-cheat has required a kernel-level driver to run from the moment a computer boots up. This “always-on” requirement has been a primary source of player frustration. Under the new On-Demand system, the Vanguard driver remains inactive until a user launches a Riot title, such as Valorant or League of Legends.

Once the game session ends, the Vanguard software shuts down automatically. This shifts the security model from continuous system monitoring to a targeted verification process that occurs at the point of entry.
The ability to run Vanguard on-demand was developed through a collaboration between Riot Games and Microsoft’s Xbox OS Security Team.
What hardware and software are required for the update?
Switching to the on-demand mode is not automatic for all users. It requires passing a security checklist called “Vanguard Pre-Check.” According to Riot, the system relies on a Windows feature known as Runtime Driver Attestation Report. This feature maintains a record of every driver loaded since the system started, allowing Vanguard to verify that no suspicious software was active while the anti-cheat was dormant.

To qualify for the toggle, a PC must meet these specific technical standards:
- Operating System: Windows 11 25H2 or higher
- Secure Boot: Enabled
- TPM 2.0: Enabled
- Virtualization-Based Security (VBS): Enabled
- Hypervisor-Protected Code Integrity (HVCI): Enabled
- IOMMU: Enabled
How many players will qualify for the new mode?
Phillip Koskinas stated that approximately 35% of the current player base meets these requirements immediately. These users will see an option to toggle On-Demand mode following their next update.
The remaining 65% of players will need to manually enable the necessary security settings, most of which are located within the system BIOS. Koskinas also noted that roughly 3% of players use hardware that is too old to support these requirements and will not be able to use the On-Demand feature.
It is important to note that this change is optional. Players who choose not to enable these settings can continue playing Valorant and League of Legends with the traditional, always-on Vanguard driver.
What are the potential performance risks for players?
While the On-Demand mode addresses privacy and system resource concerns, it introduces new technical considerations. Enabling Virtualization-Based Security (VBS) and Hypervisor-Protected Code Integrity (HVCI) can result in a slight decrease in frames per second (FPS) for some users.

Additionally, activating VBS triggers Microsoft’s vulnerable driver blocklist. This security measure may prevent older, unpatched device drivers from functioning correctly on the system.
If you experience driver errors after enabling these features, check the manufacturer’s website for updated drivers that comply with Microsoft’s latest security blocklists.
Frequently Asked Questions
Is Vanguard On-Demand mandatory?
No. Riot Games stated that players who do nothing can continue using the current version of Vanguard that runs at Windows startup.
Will I lose access to Valorant if my PC doesn’t meet the requirements?
No. Meeting the requirements only grants access to the On-Demand mode. All players can still play Riot titles using the standard anti-cheat method.
Why does it need Windows 11 25H2?
The On-Demand mode relies on specific Windows security features and driver attestation reports that are integrated into newer versions of the operating system.
What do you think about Riot’s move to On-Demand anti-cheat? Does the security trade-off affect your gaming experience? Let us know in the comments below!
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