The "Failed to save data" error in Prototype 2 on PC is a common issue caused by modern Windows security features, administrative permission conflicts, or CPU core count limitations. Technical Summary of Fixes Method Action Justification Controlled Folder Access

7. Delete Corrupted Config

Delete config.cfg from Documents\Activision\Prototype 2\. The game will recreate it.

Prototype 2 Failed to Save Data Fix: Complete Guide (2026 Update)

Prototype 2—the classic open-world action game from Radical Entertainment—remains a favorite for fans of high-octane destruction and shape-shifting combat. However, many players, especially those on PC (Steam, GOG, or older disc versions), frequently encounter a game-breaking error: "Failed to Save Data."

The "failed to save data" error in Prototype 2 typically occurs because the game lacks the necessary permissions to write to its save folder or is being blocked by modern Windows security features. Primary Fixes for Save Issues