: Ensure your user account has full access to the save data folder located at C:\Users\[YourUsername]\Documents\TechnoBrain\ATC4_g .
installation is a frequent culprit for the game failing to load or disappearing immediately after launch. Launch via Steam Library : Ensure your user account has full access
: Windows Defender might block the game from writing to the Documents folder. Go to Windows Security > Virus & threat protection > Manage ransomware protection and either disable "Controlled folder access" or add the ATC4 executable as an allowed app. Go to Windows Security > Virus & threat
After restoring, restart the game as administrator. Verification Right-click in your Library
: Users who uninstalled OpenAL during system cleanups found the game would no longer load. Verification
Right-click in your Library. Select Properties > Installed Files . Click Verify integrity of game files . 5. Update Graphics Settings