Method 2: Force Administrative Permissions and Compatibility Mode
Backup your existing files to a safe location on your desktop.
The game doesn't have "Administrator" rights to write files.
: If you use Windows Defender, go to Virus & threat protection settings > Manage Controlled folder access . Click "Allow an app through Controlled folder access" and add prototype2.exe to the list. prototype 2 failed to save data fix exclusive
Look at your Windows system tray (bottom-right corner of your screen) and right-click the cloud icon.
Delete the Prototype 2 folder entirely (backup existing saves first).
Wait for the process to complete and download any missing data. Clean the Save Directory Click "Allow an app through Controlled folder access"
Prototype 2 was designed for older hardware and often fails to handle modern CPUs with high core counts (typically more than 4 or 8 cores), leading to crashes and save corruption. Launch the game.
Here are the exclusive fixes to get you back into the action.
After investigating the issue, we've identified several potential causes: Wait for the process to complete and download
Scroll down to and click Manage controlled folder access .
To resolve the "Prototype 2 failed to save data" issue, follow these steps:
If you are stuck in this saving loop, the issue is rarely a corrupted game installation. Instead, it is almost always caused by how modern Windows operating systems handle folder permissions, user accounts, and antivirus protection.
Locate your save folder, typically found at: C:\Users\[Your Username]\Documents\Activision\Prototype 2\ Right-click the Prototype 2 folder and select . Under the General tab, uncheck the Read-only attribute.