⚠️ 2 verified solutions available for Error 8490 — Last updated 2026-03-24
Error 8490 📋

Fix ERROR_DS_PDC_OPERATION_IN_PROGRESS — Windows Error Code 8490

Error 8490 (ERROR_DS_PDC_OPERATION_IN_PROGRESS) is a Windows Active Directory error that occurs when another operation which requires exclusive access to the pdc fsmo is already in progress.. This guide provides step-by-step solutions to resolve this issue.

🏷️ Code: 8490 📛 ERROR_DS_PDC_OPERATION_IN_PROGRESS 📅 Updated: 2026-03-24 ⏱️ 2 Solutions
⚡ Quick Fix

Rejoin the Domain: Open System Properties → Change → set to Workgroup → OK → Restart

👇 See all 2 solutions below
🐞 Auto-Fix Script for Error 8490
⚠️ How to use: Open PowerShell as Administrator, paste the code above, and press Enter.
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📑 Table of Contents
What is Error 8490? Common Causes Step-by-Step Solutions Prevention Tips Related Errors

💡 What is Error 8490?

Windows System Error Code 8490, known as ERROR_DS_PDC_OPERATION_IN_PROGRESS, is a Active Directory error that occurs during Active Directory and directory services. The error indicates that: Another operation which requires exclusive access to the PDC FSMO is already in progress. When this error is encountered, the Windows operating system was unable to complete the requested operation within the directory services subsystem. The error code 8490 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_DS_PDC_OPERATION_IN_PROGRESS 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 Active Directory and directory services is essential for effective troubleshooting.

⚠️ Common Causes

  • System resource conflict: Another operation which requires exclusive access to the PDC FSMO is already in progress.
  • Computer lost domain trust
  • Time sync beyond Kerberos limit
  • DNS preventing DC discovery
📚 Comprehensive Guide

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

1 Rejoin the Domain
  1. Open System Properties → Change → set to Workgroup → OK → Restart
  2. Then change back to Domain → enter domain name → OK → Restart
  3. This re-establishes the trust relationship
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Show Advanced Solutions (1 more)
2 Advanced Diagnostic for ERROR_DS_PDC_OPERATION_IN_PROGRESS
  1. Open Windows Event Viewer (eventvwr.msc)
  2. Navigate to Windows Logs → System to find Event ID 8490
  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 8490 (Ds Pdc Operation In Progress)
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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 "*8490*" -or $_.Message -like "*ERROR_DS_PDC_OPERATION_IN_PROGRESS*"} | Format-List

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

🛡️ Prevention Tips

  • Ensure reliable NTP sources
  • Monitor DC health with dcdiag
  • Use redundant DNS servers
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Last updated: 2026-03-24
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Based on Official Microsoft Documentation
Solutions Tested on Windows 10 & 11
Error codes sourced from Microsoft Win32 SDK. Updated 2026-03-24.
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