⚠️ 2 verified solutions available for Error 4252 — Last updated 2026-03-10
Error 4252 📋

Fix ERROR_NOT_SUPPORTED_IN_APPCONTAINER — Windows Error Code 4252

Error 4252 (ERROR_NOT_SUPPORTED_IN_APPCONTAINER) is a Windows DNS & WINS error that occurs when this functionality is not supported in the context of an app container.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 4252 📛 ERROR_NOT_SUPPORTED_IN_APPCONTAINER 📅 Updated: 2026-03-10 ⏱️ 2 Solutions
⚡ Quick Fix

Flush DNS and Switch Servers: Open Command Prompt as Administrator

👇 See all 2 solutions below
🐞 Auto-Fix Script for Error 4252
⚠️ How to use: Open PowerShell as Administrator, paste the code above, and press Enter.
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📑 Table of Contents
What is Error 4252? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 4252?

Windows System Error Code 4252, known as ERROR_NOT_SUPPORTED_IN_APPCONTAINER, is a DNS & WINS error that occurs during DNS resolution and WINS name resolution. The error indicates that: This functionality is not supported in the context of an app container. When this error is encountered, the Windows operating system was unable to complete the requested operation within the DNS/WINS services subsystem. The error code 4252 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_NOT_SUPPORTED_IN_APPCONTAINER 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 DNS resolution and WINS name resolution is essential for effective troubleshooting.

⚠️ Common Causes

  • System resource conflict: This functionality is not supported in the context of an app container.
  • DNS server misconfigured
  • Stale DNS cache entries
  • Hostname cannot be resolved
📚 Comprehensive Guide

Advanced Network Troubleshooting: DNS Flushes, Winsock Resets, and Adapter Fixes

The ultimate encyclopedia on resolving Windows network stack failures, TCP/IP corruption, Winsock errors, and DNS cache poisoning.

Read the full guide →

✅ Step-by-Step Solutions

1 Flush DNS and Switch Servers
  1. Open Command Prompt as Administrator
  2. Run: ipconfig /flushdns
  3. Change DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1)
  4. Run: ipconfig /registerdns
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2 Advanced Diagnostic for ERROR_NOT_SUPPORTED_IN_APPCONTAINER
  1. Open Windows Event Viewer (eventvwr.msc)
  2. Navigate to Windows Logs → System to find Event ID 4252
  3. Look for associated warnings that occurred immediately before the system crashed
  4. Right-click the entry and export the log file for further analysis

🎬 Video Tutorials

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How to fix Error 4252 (Not Supported In Appcontainer)
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💻 Diagnostic Command

Run this PowerShell command to find related events in your system log:

Get-EventLog -LogName System -Newest 20 | Where-Object {$_.Message -like "*4252*" -or $_.Message -like "*ERROR_NOT_SUPPORTED_IN_APPCONTAINER*"} | Format-List

💡 Open PowerShell as Administrator, paste the command above, and press Enter.

🛡️ Prevention Tips

  • Use reliable DNS (8.8.8.8 or 1.1.1.1)
  • Flush DNS cache periodically
  • Monitor DNS resolution performance
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Last updated: 2026-03-10
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-10.
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