Valorant Unsupported OS Error: Fixes That Work
The “unsupported operating system” error in Valorant appears when the game’s anti-cheat (Vanguard) detects a Windows version it no longer supports, most commonly Windows 7, 8, or 8.1. The fix is to upgrade to Windows 10 or 11 (64-bit), or if you’re already on a supported version, to update Windows and ensure Secure Boot and TPM 2.0 are enabled. Below is a complete guide to understanding and resolving this error.
What Causes the Unsupported OS Error
Riot Games officially ended support for Windows 7, 8, and 8.1 in September 2022, after Microsoft ended extended support for those systems. Vanguard, Valorant’s kernel-level anti-cheat, relies on security features that only exist in Windows 10 and 11, such as Virtualization-Based Security (VBS) and Hypervisor-Enforced Code Integrity (HVCI). When the game detects an older OS, it blocks launch with the error message: “This version of the operating system is not supported.”
The error can also occur on Windows 10 or 11 if the system is missing critical updates, or if Secure Boot and TPM 2.0 are disabled—requirements for Windows 11 but not for Windows 10. In rare cases, a corrupted Vanguard driver or a pending Windows update can trigger the same message.
How to Check Your Windows Version
Before making changes, confirm which Windows version you have. Press Windows key + R, type winver, and press Enter. A dialog box shows the version and build number. If it says Windows 7, 8, or 8.1, you’ll need to upgrade to Windows 10 or 11. If it says Windows 10 or 11, check for updates and verify that your build is recent (Windows 10 version 21H2 or later, or Windows 11 version 21H2 or later).
Step-by-Step Fixes
- Upgrade to Windows 10 or 11 – If you’re on an unsupported OS, the only permanent fix is a clean installation or an in-place upgrade. Back up your files first. Windows 10 is still available through Microsoft’s official media creation tool, and Windows 11 requires a compatible CPU, 4GB RAM, 64GB storage, UEFI with Secure Boot, and TPM 2.0.
- Install all Windows updates – Go to Settings > Update & Security (Windows 10) or Settings > Windows Update (Windows 11) and click “Check for updates.” Install all pending updates, including optional ones, then restart.
- Enable Secure Boot and TPM 2.0 – If you’re on Windows 11 and see the error, these features may be off. Restart your PC, enter the BIOS/UEFI (usually by pressing Del, F2, or F12 during boot), find “Secure Boot” and “TPM” (often under Security or Trusted Computing), enable them, save and exit. Then verify in Windows by running
tpm.msc. - Repair or reinstall Vanguard – Open the Valorant launcher, click the gear icon, and select “Repair.” If that fails, uninstall Vanguard (via Control Panel), restart, then launch Valorant—it will reinstall Vanguard automatically.
- Run a clean boot – Disable non-Microsoft startup programs to rule out conflicts. Press Win+R, type
msconfig, go to the Services tab, check “Hide all Microsoft services,” click “Disable all,” then restart. If the error disappears, re-enable services one by one to find the culprit.
What If You Can’t Upgrade?
If your hardware doesn’t meet Windows 11’s requirements and you don’t want to use Windows 10 (which reaches end of support in October 2025), you have limited options. The game will not run on Linux or macOS, and using a virtual machine is blocked by Vanguard. Some players have used compatibility mode (right-click the game executable > Properties > Compatibility > Run in Windows 8 mode), but this does not bypass the OS check and is not reliable. The only realistic path is to upgrade to a supported Windows version.
Common Misconceptions
A frequent myth is that the error appears because your graphics card is too old. That’s false—the error is purely about the OS. Another misconception is that disabling Vanguard or running the game as administrator fixes it; neither works because the check happens at the kernel level. Also, some players believe that changing the system registry to fake a newer Windows version will help. This is not recommended and can damage your system; Vanguard actively detects such tampering and may ban your account.
Preventing Future Issues
To avoid this error in the future, keep Windows updated automatically, enable Secure Boot and TPM if you ever upgrade to Windows 11, and never disable Vanguard’s startup service (vgk.sys). Also, check Valorant’s official system requirements page periodically, as Riot may raise the minimum OS version again as Windows 10 approaches its end-of-life.
Frequently Asked Questions
Can I play Valorant on Windows 7 with a workaround?
No. Vanguard’s kernel driver does not load on Windows 7, and the game will not start. No known workaround exists, and attempting to bypass it violates Riot’s terms of service.
Will the error go away if I update Windows 10?
Yes, if your Windows 10 is outdated. Install all updates, especially feature updates, and restart. If it persists, repair Vanguard as described above.
Does the error mean my PC is too weak?
No. It only indicates an incompatible operating system. Your CPU, GPU, and RAM are irrelevant to this specific error.
Is Windows 11 required for Valorant?
No. Windows 10 64-bit (version 1909 or later) is fully supported. Windows 11 is optional.
Why does Vanguard block older Windows versions?
Because older Windows versions lack modern security features like Virtualization-Based Security, making it easier for cheaters to hide malicious code from the anti-cheat.
What if I get the error after a Windows update?
Rarely, a Windows update can corrupt Vanguard. Uninstall Vanguard, restart, and let Valorant reinstall it. If that fails, use System Restore to revert the update, then reinstall Vanguard.
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