Software⏱️ 3 min read📅 2026-06-11

How to Fix 0x80072746 Error – Windows Sandbox fails to connect, Error 0x80072746

Windows Sandbox error 0x80072746 causes black screen and crashes.

Quick Answer: Try disabling Hyper-V, Windows Sandbox, and virtualization in BIOS to resolve the issue.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. 🔧 Proven Troubleshooting Steps
  3. 💡 Conclusion

Windows Sandbox has stopped working recently, causing frustration for users who rely on its isolation and security features. The error 0x80072746 appears when launching Windows Sandbox, resulting in an unresponsive window and a crash. Despite no changes to the system or software, this issue persists.

This troubleshooting guide aims to help resolve the Windows Sandbox failure to connect error 0x80072746. By following the steps outlined below, users can identify and fix potential causes of this problem.

⚠️ Common Causes

  • The primary cause of this error is likely related to a corrupted or malfunctioning Windows Sandbox process. The sandbox's connection to the host system may be lost due to various factors such as software conflicts, driver issues, or system file corruption.
  • Another possible reason for this issue is an incomplete or failed installation of Windows Sandbox. In some cases, the sandbox's configuration files might not have been properly set up during installation, leading to connectivity problems.

🔧 Proven Troubleshooting Steps

Resetting Windows Sandbox Configuration

  1. Step 1: Disable any third-party antivirus software that may be interfering with Windows Sandbox.
  2. Step 2: Run the DISM tool to repair corrupted system files and ensure a clean configuration: Open Command Prompt as Administrator, type `dism /online /cleanup-image /restorehealth`, and press Enter. Repeat this process if prompted for administrator credentials.
  3. Step 3: Manually delete any remaining Windows Sandbox-related files in the %localappdata%\Microsoft\Windows Sandbox directory (e.g., WindowsSandbox.exe, WindowsSandbox.log).

Reinstalling Windows Sandbox

  1. Step 1: Open the Control Panel and navigate to 'Programs and Features' (or 'Add or Remove Programs'). Locate Windows Sandbox in the list of installed programs, right-click it, and select 'Uninstall'.

💡 Conclusion

To resolve the Windows Sandbox failure to connect error 0x80072746, try resetting the sandbox's configuration by following Steps 1-3. If this method does not work, consider reinstalling Windows Sandbox (Steps 1-2). In either case, ensure that your system is up-to-date and restart your computer after making any changes. If the issue persists, seek further assistance from Microsoft support or a qualified IT professional.

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