Ensure C:\Users\[YourName]\Documents\Activision\Prototype 2 isn't set to Read-only . Limit Processor Affinity: Open Task Manager while the game is running. Go to Details , right-click prototype2.exe .

The most common culprit is Windows Defender's "Controlled Folder Access," which views Prototype 2 as a suspicious application trying to modify your personal files.

Modern Windows security or cloud syncing can block the game's save requests.

The most successful, exclusive fix for Prototype 2 save issues is limiting the CPU cores available to the game. Run Prototype 2 . Open Task Manager: Press Ctrl + Shift + Esc . Go to Details: Click the "Details" tab.

The game cannot write to the Documents folder.

To fix this, create a new using standard alphanumeric English characters only. Log into the new account and run the game.

Open the and type Windows Security , then press Enter. Click on Virus & threat protection . Scroll down and click on Manage ransomware protection .

Prototype 2 Failed to Save Data Fix Exclusive Getting the "failed to save data" error in Prototype 2 completely halts your progression in New York Zero. This frustrating glitch typically triggers when the game lacks administrative permissions, faces Windows Defender restrictions, or struggles with modern multi-core processors.

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Your security software might be a silent blocker.

Optimistic concurrency with versioning (if DB supports conditional updates)