Verify game files:
This error message (“Football Manager 2018 failed to start Denuvo driver”) became a well-known issue shortly after the game’s release in November 2017. Here’s the story behind it.
- Windows Update KB5025885 and later: Microsoft introduced stricter Driver Signature requirements (SHA-1 deprecation). FM18’s Denuvo driver uses an older signature.
- Memory Integrity (Hypervisor-protected Code Integrity): A core security feature in Windows 11 that blocks unsigned drivers.
- Corrupted Denuvo license cache: Even if you own the game legally, a stale token file can confuse the driver.
- Third-party anti-cheat conflicts: If you play Valorant (Vanguard) or FaceIt (anti-cheat), those drivers occupy the same kernel space as Denuvo.
The most effective solutions often involve addressing permissions or conflicting third-party software that may be blocking the Denuvo service from launching. football manager 2018 failed to start denuvo driver