: Right-click prototype2.exe , select Properties , and go to the Compatibility tab.
How to Fix Prototype 2 "Failed to Save Data" on Windows 10/11
: Click "Allow an app through Controlled folder access" > Add an allowed app > Browse all apps . prototype 2 failed to save data fix
Windows Security sometimes blocks Prototype 2 from accessing your storage as a ransomware protection measure.
If you're seeing the "Failed to save data" message in Prototype 2 , you're likely dealing with a permissions conflict or a core-affinity issue common to older PC ports running on modern hardware. This error can prevent you from starting a new game or progress from being recorded. 1. Run as Administrator : Right-click prototype2
: Move any existing files to a backup folder on your desktop, then delete them from the original folder to let the game create a clean save. 4. Limit CPU Core Affinity
: Go to %UserProfile%\Documents\Activision\Prototype 2 . If you're seeing the "Failed to save data"
: Search for "Controlled folder access" in the Windows Start menu.
: Navigate to your installation folder and select prototype2.exe to whitelist it. 3. Clear Old Save Conflicts