: Scroll down to Controlled folder access and click Manage Controlled folder access .
I can provide specific system adjustments based on your setup. Share public link
Locate the game executable ( prototype2.exe ) in your installation folder (usually under Steam\steamapps\common\Prototype 2 ). Right-click it and select > Compatibility . Check Run this program as an administrator . prototype 2 failed to save data fix
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:
Look for the folder named (or Prototype 2 directly, depending on your version). Right-click the folder and select Properties . Uncheck the Read-only box at the bottom of the General tab. Switch to the Security tab and click Edit . Select your Windows user profile from the list. Ensure Full control is checked under the "Allow" column. Click Apply and OK . 5. Verify Integrity of Game Files (Steam) : Scroll down to Controlled folder access and
: Click Allow an app through Controlled folder access > Add an allowed app .
Click and ensure the administrator box is checked there as well. Whitelist via Windows Defender: Right-click it and select > Compatibility
Method 3: Grant Administrator Privileges and Adjust Compatibility
If you need help , configuring CPU core affinity limits to stop startup crashes, or finding community patch mods , let me know so we can get your copy running perfectly! Failed to save data message preventing play
It sounds like you're encountering a common issue in Prototype 2 where the game fails to save your progress (e.g., “Failed to save data” or “Save failed”). Here’s a structured fix guide: