"failed to start Denuvo driver" Football Manager 2018 typically caused by conflicts with modern Windows security features, third-party anti-cheat software, or antivirus interference Common Fixes Run as Administrator : Right-click the game's executable ( ) and select Run as administrator Disable Conflicting Anti-Cheats : Programs like Riot Vanguard (for Valorant) or are known to block older Denuvo drivers. Exit these from your system tray or uninstall them before launching the game. Antivirus Exclusions : Check if your antivirus or Windows Defender has quarantined game files. Add the entire Football Manager 2018 installation folder to your antivirus Exclusion/Exceptions Windows Update Conflicts : Recent Windows security updates can occasionally break compatibility with older DRM versions. Some users have resolved this by rolling back the latest Windows update or reinstalling the game. Delete winmm.dll : If you are using a modified version of the game, some community sources suggest deleting the file located in the game's installation folder, though this may vary depending on the specific build. Additional Troubleshooting Error code - Microsoft Q&A
Football Manager 2018 Won't Launch? How to Fix the "Failed to Start Denuvo Driver" Error There are few things more frustrating than gearing up for a new season, setting up your tactics, and getting ready to lead your team to glory—only to be stopped dead in your tracks before the game even opens. For many Football Manager 2018 players, this frustration manifests in a specific, confusing error message: "Failed to start Denuvo driver." If you are staring at this error code, don't panic. While it sounds technical, it is usually a straightforward fix. In this post, we will explain why this error happens and provide step-by-step solutions to get your game running again. What is the Denuvo Driver? To understand the fix, it helps to understand the problem. Denuvo is a Digital Rights Management (DRM) system used by developers (in this case, Sports Interactive and SEGA) to prevent piracy. It ensures that the game is legitimate and hasn't been tampered with. FM2018 relies on this system to launch. The "driver" mentioned in the error is a specific file (often named Denuvo64.sys ) that handles this security check. If Windows blocks this driver or if the file becomes corrupted, the game assumes something is wrong and refuses to start. Here are the three most common causes and how to fix them.
Solution 1: Update Your Windows OS (The Most Common Fix) The single most common reason for this error is an outdated version of Windows. Denuvo drivers rely on specific security certificates to run. If your Windows hasn't been updated recently, it may not recognize the Denuvo signature, causing it to block the driver entirely. How to fix it:
Press the Windows Key and type "Check for updates." Select "Check for updates" from the results. Click the "Check for updates" button. If you see "Feature Update" available (e.g., a major version update), download and install it immediately. Restart your computer. football manager 2018 failed to start denuvo driver
Note: Even if you think your PC updates automatically, manually checking often reveals major updates that were pending a restart.
Solution 2: Repair Corrupted Game Files Sometimes, the issue isn't Windows; it's the game itself. If a power outage or a bad installation corrupted the Denuvo driver file, the game won't know how to launch. Steam has a built-in tool to fix this. How to fix it:
Open Steam and go to your Library . Right-click on Football Manager 2018 . Select Properties . Go to the Local Files tab. Click "Verify Integrity of Game Files..." Let Steam scan the files. If it finds any missing or corrupted drivers, it will automatically re-download them. Add the entire Football Manager 2018 installation folder
Solution 3: Adjust Antivirus and Firewall Settings Because Denuvo is a third-party driver that interacts deeply with your system security, overzealous antivirus software often flags it as a "false positive" (mistaking it for malware) and quarantines it. How to fix it:
Open your Antivirus software (Windows Defender, Norton, McAfee, etc.). Look for your Quarantine or Virus History . Check if a file named Denuvo64.sys or similar has been blocked. If so, select "Restore" or "Allow." To prevent this from happening again, go to your Antivirus settings and add an Exclusion for the Football Manager 2018 installation folder (usually C:\Program Files (x86)\Steam\steamapps\common\Football Manager 2018 ).
Solution 4: Run as Administrator Sometimes, the game simply doesn't have permission to launch the security driver. How to fix it: Here is the checklist to follow:
Navigate to your Football Manager 2018 installation folder. Find the FM.exe file. Right-click the file and select Properties . Go to the Compatibility tab. Check the box that says "Run this program as an administrator." Click Apply and OK .
Summary The "Failed to start Denuvo driver" error in Football Manager 2018 is almost always a security communication error between the game and Windows. Here is the checklist to follow: