⚠️ 3 verified solutions available for Error 800 — Last updated 2026-03-03
Error 800 📋

Fix ERROR_OPLOCK_SWITCHED_TO_NEW_HANDLE — Windows Error Code 800

Error 800 (ERROR_OPLOCK_SWITCHED_TO_NEW_HANDLE) is a Windows File & Disk error that occurs when the oplock that was associated with this handle is now associated with a different handle.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 800 📛 ERROR_OPLOCK_SWITCHED_TO_NEW_HANDLE 📅 Updated: 2026-03-03 ⏱️ 3 Solutions
⚡ Quick Fix

Check and Repair Disk Errors: Open Command Prompt as Administrator

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🐞 Auto-Fix Script for Error 800
⚠️ How to use: Open PowerShell as Administrator, paste the code above, and press Enter.
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📑 Table of Contents
What is Error 800? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 800?

Windows System Error Code 800, known as ERROR_OPLOCK_SWITCHED_TO_NEW_HANDLE, is a File & Disk error that occurs during file system and disk I/O operations. The error indicates that: The oplock that was associated with this handle is now associated with a different handle. When this error is encountered, the Windows operating system was unable to complete the requested operation within the file management subsystem. The error code 800 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_OPLOCK_SWITCHED_TO_NEW_HANDLE 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 file system and disk I/O operations is essential for effective troubleshooting.

⚠️ Common Causes

  • System resource conflict: The oplock that was associated with this handle is now associated with a different handle.
  • The file or directory does not exist or was moved
  • Insufficient permissions on the target
  • Disk has bad sectors or is full
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✅ Step-by-Step Solutions

1 Check and Repair Disk Errors
  1. Open Command Prompt as Administrator
  2. Run: chkdsk C: /f /r (replace C: with affected drive)
  3. Type Y to schedule scan on next restart
  4. Restart and wait for the scan to complete
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2 Verify File Permissions
  1. Right-click the file/folder → Properties → Security tab
  2. Click Edit → Add your username → Grant Full Control
  3. Click Apply → OK
3 Use Windows File Recovery
  1. If a file was accidentally deleted, check Recycle Bin first
  2. Install 'Windows File Recovery' from the Microsoft Store (free)
  3. Run: winfr C: D: /extensive (scans C:, saves to D:)
  4. Check the recovered files in the output folder

🎬 Video Tutorials

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How to fix Error 800 (Oplock Switched To New Handle)
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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 "*800*" -or $_.Message -like "*ERROR_OPLOCK_SWITCHED_TO_NEW_HANDLE*"} | Format-List

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

🛡️ Prevention Tips

  • Back up important files regularly
  • Run CHKDSK periodically
  • Keep 15%+ free space on system drive
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Last updated: 2026-03-03
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-03.
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