🎮 Common Scenario: Are you experiencing Error 1397 while launching or installing Fortnite? The solutions below directly address the system interactions specific to this application.
Run as Administrator: Right-click the application → 'Run as administrator'
👇 See all 2 solutions belowThe Ultimate Auto-Fix Script
Download our advanced, custom-built Smart Diagnostic Script (.bat). It safely creates a System Restore Point, applies targeted fixes based on advanced diagnostics for Error 1397, and generates a detailed HTML repair report.
What is Error 1397?
Windows System Error Code 1397, known as ERROR_MUTUAL_AUTH_FAILED, is a Security & Privileges error that occurs during security, authentication, and user privileges. The error indicates that: Mutual Authentication failed. The server's password is out of date at the domain controller. When this error is encountered, the Windows operating system was unable to complete the requested operation within the security services subsystem. The error code 1397 is returned by the GetLastError() function and provides developers with a specific identifier to diagnose the root cause of the failure. The symbolic name ERROR_MUTUAL_AUTH_FAILED maps directly to this numeric code and is commonly referenced in Microsoft documentation, developer forums, and system logs. Understanding this error and its context within security, authentication, and user privileges is essential for effective troubleshooting.
Common Causes
- User account lacks required permissions
- Group Policy restricts access
- Authentication credentials expired
- UAC is blocking the action
Fixing Permission Denied (0x80070005) and Access Violation Errors
An encyclopedia on Windows NT File System (NTFS) permissions, taking ownership via command line, and surviving 0x80070005 Access Denied errors.
Read the full guide →Step-by-Step Solutions
- Right-click the application → 'Run as administrator'
- If Error 1397 (ERROR_MUTUAL_AUTH_FAILED) resolves, it's a permissions issue
- For permanent fix, right-click → Properties → Compatibility → check 'Run as administrator'
Video Tutorials
Diagnostic Command
Run this PowerShell command to find related events in your system log:
Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*1397*" -or $_.Message -like "*ERROR_MUTUAL_AUTH_FAILED*"} | Format-List💡 Open PowerShell as Administrator, paste the command above, and press Enter.
Prevention Tips
- Apply least-privilege principle
- Audit user accounts regularly
- Keep security policies and AV updated