. Below is an informative report outlining the primary causes and proven fixes. Primary Cause: Windows Controlled Folder Access
The installation script occasionally fails to generate the required folders manually. prototype 2 failed to save data fix
For , the fix is running as administrator + disabling OneDrive on the Documents folder. If that fails, manually creating the save folder with full permissions solves it. The error is not a game-breaking bug—it’s a Windows permission issue with older games. prototype 2 failed to save data fix
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Windows Defender includes a security feature called Controlled Folder Access that blocks unauthorized applications from writing data to your Documents folder. Because Prototype 2 is an older title, Windows often flags it as a threat. prototype 2 failed to save data fix