Windows Security sometimes blocks Prototype 2 from accessing your storage as a ransomware protection measure.

If DirectX is intact, the issue lies in Windows denying write access.

Check the box next to Run this program as an administrator . Apply changes: Click Apply and then OK . 2. Disable Controlled Folder Access

Let’s be real for a second. Prototype 2 is over a decade old. It is a victim of the “abandonware” era. Activision has moved on to Call of Duty and Crash Bandicoot . There will be no official patch.

Right-click the folder (or the Prototype 2 folder inside it) and select Properties .

Locate the file in your installation directory (usually found under Steam\steamapps\common\Prototype 2 ). Right-click on the executable file and select Properties . Navigate to the Compatibility tab.

For persistent issues, the game's community has created powerful tools that address many problems at once.

Save the file and set it to (Right-click > Properties > Check Read-only) if the game keeps overwriting it. Summary Checklist Target Issue Run as Admin Permission Denied Disable Ransomware Protection Windows Defender Block Create Manual Folders Missing Directory Disable OneDrive Cloud Conflict Antivirus Exclusion Security Software Block

The "failed to save data" error in Prototype 2 is usually caused by modern Windows security settings (Controlled Folder Access), administrative privilege issues, or the game's incompatibility with high-core-count CPUs. Run as Administrator: