Prototype 2 Failed To Save Data Fix Jun 2026

The game expects saves in:

Windows Defender includes a ransomware protection feature called "Controlled Folder Access." While excellent for security, it frequently blocks older games from writing save files to your Documents or AppData folders.

Why does this happen? Is Prototype 2 broken forever? Is it a conspiracy by Blackwatch to stop you from winning? prototype 2 failed to save data fix

If is turned on, click Allow an app through Controlled folder access . Click Add an allowed app and choose Browse all apps .

Search for in your Windows Start menu.

Navigate to the Compatibility tab.

Windows Defender has a feature called "Controlled Folder Access" that prevents programs from modifying files in documents folders, which can block game saves. Open the and type "Windows Security". Go to Virus & threat protection . Click on Manage ransomware protection (at the bottom). Toggle Controlled folder access to Off . The game expects saves in: Windows Defender includes

The Prototype engine (Titanium engine) notoriously breaks down on modern CPUs featuring more than 4 or 8 cores, causing crashes, memory leaks, and save corruption. Limiting the game to fewer CPU threads can stabilize the save mechanics. Launch Prototype 2 . Press Ctrl + Shift + Esc to open the . Go to the Details tab. Right-click prototype2.exe and select Set affinity . Uncheck All Processors .

Click the Windows Start menu, type , and open the app. Click on Virus & threat protection . Scroll down and click on Manage ransomware protection . Is it a conspiracy by Blackwatch to stop you from winning

If you are still struggling, ensure you complete these quick checks:

Press the Windows Key , type "Windows Security," and hit Enter . Navigate to Protection: Click on Virus & threat protection .