To fix the "failed to save data" error in Prototype 2 , the most effective solution is usually granting the game administrative privileges or adjusting Windows security settings that block the game from writing to your Documents folder. 1. Run as Administrator and Compatibility Mode
This is the most common fix to bypass folder permission issues. Steam Library , right-click Prototype 2 , and select Browse local files Right-click prototype2.exe and select Properties Compatibility Run this program as an administrator (Optional) Check Run this program in compatibility mode for and select Steam Community 2. Allow Through Controlled Folder Access
Windows Defender often blocks the game from creating save files in the %USERPROFILE%\Documents\Activision\Prototype 2 directory. Search for Controlled folder access in your Windows search bar and open it. Allow an app through Controlled folder access Add an allowed app Browse all apps Navigate to your Prototype 2 installation folder and select prototype2.exe 3. Disable OneDrive Syncing
On Windows 10 and 11, OneDrive frequently hijacks the "Documents" folder, which can cause save path errors for older games. Sign out of OneDrive or pause syncing before launching the game.
Alternatively, right-click your Documents folder, go to Properties, and ensure it is not set to Steam Community 4. Create a Local User Account (Last Resort)
If the game still refuses to save due to deep-seated account permissions or special characters in your Windows username, creating a new local administrator account often bypasses the issue entirely. Steam Community Family & other users Add someone else to this PC I don't have this person's sign-in information Add a user without a Microsoft account Set the new account as an Administrator and switch to it to play. Steam Community
Failed to save data message preventing play Recently I've installed the game on my new compy, but every time I try to play it, it requires creating a new slot to save progress, however, clicking on ok to confirm this guarantees a "failed to save data" message, and consequently I haven't been able to play the game at all. Is there any way to overcome this? Your help is greatly appreciated <3
The "failed to save data" error in Prototype 2 is a common technical issue on modern Windows systems, typically caused by permission conflicts or hardware incompatibility.
Below is a technical summary (frequently requested as a "paper" or guide) of the primary solutions used by the community to resolve this specific error. 1. Controlled Folder Access (Primary Fix)
Windows Defender often blocks the game from writing to your Documents folder, which is where save files are stored.
Open Windows Security and navigate to Virus & threat protection. Select Manage ransomware protection. Click Allow an app through Controlled folder access.
Add prototype2.exe (found in the game's installation folder) to the allowed list. 2. Administrative and Folder Permissions
General permission issues can prevent the game from creating the necessary save directory. prototype 2 failed to save data fix exclusive
Run as Administrator: Right-click prototype2.exe, go to Properties > Compatibility, and check "Run this program as an administrator".
Toggle Read-Only: Navigate to your Documents folder, right-click the Activision (or Prototype 2) folder, and ensure "Read-only" is unchecked.
Install Location: Re-installing the game outside of the Program Files (x86) folder (e.g., directly to C:\Games) can bypass system-level folder restrictions. 3. CPU Core Limitation (Affinity Fix)
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.
Open Task Manager (Ctrl+Shift+Esc), go to the Details tab, and right-click prototype2.exe. Select Set affinity and uncheck all but CPU 0, 1, 2, and 3.
Alternatively, use a Steam Launch Shortcut to automate this: cmd /C start "steam" /affinity 0xff "C:\Program Files (x86)\Steam\steam.exe". 4. Local User Account Workaround
If the error persists due to a corrupted user profile or OneDrive syncing issues, creating a local administrator account can resolve it.
Create a new local user account on Windows and set it as an Administrator.
Log into that account and launch the game. This often bypasses pathing issues caused by special characters in your primary username or OneDrive integration. 5. Third-Party Fixes
The community-developed Prototype 2 Fix mod on PCGamingWiki or Nexus Mods can resolve multiple stability issues, including save errors and resolution bugs, by modifying the game's internal .ini files. Failed to save data message preventing play
The "Failed to Save Data" error is a remnant of the game’s transition to newer operating systems. By forcing the game to save to a simple directory path (Fix #1) or disabling Steam Cloud interference (Fix #2), you aren't just fixing a bug—you’re outsmarting the outdated code. Get back out there, Sgt. Heller; New York Zero isn't going to save itself.
The "Failed to save data" error in Prototype 2 on modern Windows systems (10/11) is typically caused by insufficient folder permissions or the game's inability to handle high CPU core counts. You can resolve this through administrator tweaks, security settings, or a specific local account workaround. Primary Fixes Administrator & Compatibility Mode: To fix the "failed to save data" error
Right-click prototype2.exe in your Steam library files and select Properties.
In the Compatibility tab, check Run this program as an administrator and Disable fullscreen optimizations. Set the compatibility mode to Windows 7 or Windows 8. Controlled Folder Access (Windows Defender):
Open Windows Security > Virus & threat protection > Manage settings.
Under Controlled folder access, click Allow an app through Controlled folder access.
Add prototype2.exe to the allowed list to permit it to write save files to your Documents folder. Core Affinity Adjustment: The game often fails when running on more than 4 CPU cores.
Launch the game, Alt+Tab out, open Task Manager, go to the Details tab, right-click prototype2.exe, select Set affinity, and uncheck all but the first four cores (0, 1, 2, 3). The "Exclusive" Fix (Local Administrator Account)
If the standard permission fixes fail, creating a fresh local Windows account often resolves deep-seated permission conflicts that prevent saving. Create a Local Account:
Go to Settings > Accounts > Other users > Add someone else to this PC.
Choose "I don't have this person's sign-in information" followed by "Add a user without a Microsoft account". Elevate to Administrator: Change the new account's type to Administrator. Sign Out of OneDrive:
OneDrive syncing of the Documents folder can sometimes lock the game's save directory. Disconnecting or signing out before playing can prevent this. Reinstall/Launch:
Log into the new local account and launch the game. This fresh environment bypasses profile-specific permission errors. Additional Maintenance
Verify Integrity: Use the Steam client to verify game files if the game crashes during the save attempt. 10) Quick checklist to apply now
Disable HID Devices: In Device Manager, try disabling HID-compliant consumer control devices if you experience lag or crashes alongside save failures.
Here is the full, exclusive guide to fixing the "Failed to save data" error in Prototype 2.
This error is notorious on PC (especially on Windows 10 and 11) because the game was poorly ported and tries to write save files to a protected system folder. It also plagues players trying to use the Radnet DLC.
Follow these steps in order.
takeown /f "%USERPROFILE%\Documents\Activision\Prototype2" /r /d y
icacls "%USERPROFILE%\Documents\Activision\Prototype2" /grant "%USERNAME%:(F)" /t
Once you get a successful save, cement it:
Documents\Activision\Prototype 2\ folder weekly.If you haven't tried these, start here. However, if you've already attempted them and failed, skip to Phase 2.
Most people think the game is broken. It’s not. Prototype 2 is just old. It was coded in an era when Windows didn't protect its "Documents" folder like Fort Knox. The game tries to write your save file to Documents/Prototype 2/, but Windows UAC (User Account Control) says, "Whoa there, radical 2009 middleware. You don't have permission to do that."
The game doesn't crash. It doesn't warn you. It just smiles, pretends to save, and throws your data into a digital black hole.
The game tries to save to a specific user folder. If your Windows username contains spaces or special characters, or if the folder simply doesn't exist, the game crashes the save process.
Step 1: Create the Required Folder
Users > [Your Username].AppData. If you do not see it:
AppData, then open Local.Local, look for a folder named Activision.
Activision (Case sensitive).Activision folder.Prototype 2.
Prototype 2.Step 2: Fix Windows Permissions If the folder exists but the game still won't save, Windows Security is blocking the game from writing files.
Prototype 2 folder you just verified/created.Please wait... it will take a second!