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Likely causes (most common)
A known conflict exists between Denuvo and (the anti-cheat for Valorant ). football manager 2018 failed to start denuvo driver
Before a full reinstall, a quicker step is to have Steam verify the game's files. This checks for and repairs only the corrupted or missing files without needing to re-download the entire game. Likely causes (most common) A known conflict exists
Unlike newer games that update their Denuvo version automatically, Football Manager 2018 is frozen in time. Sports Interactive and SEGA no longer patch this version. This means you are trying to run a 2018-era kernel driver on a 2025 operating system. The specific triggers include: Unlike newer games that update their Denuvo version
Modern Windows configurations use Virtualization-Based Security (VBS) and Core Isolation. These security measures block older kernel drivers—including the 2017/2018 iterations of Denuvo—from launching properly. Turn Off Core Isolation
The "Failed to start Denuvo driver" error in Football Manager 2018