Flush DNS and Switch Servers: Open Command Prompt as Administrator
👇 See all 2 solutions belowWhat is Error 5018?
Windows System Error Code 5018, known as ERROR_RESMON_ONLINE_FAILED, is a DNS & WINS error that occurs during DNS resolution and WINS name resolution. The error indicates that: The cluster resource could not be brought online by the resource monitor. 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 5018 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_RESMON_ONLINE_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 DNS resolution and WINS name resolution is essential for effective troubleshooting.
Common Causes
- System resource conflict: The cluster resource could not be brought online by the resource monitor.
- DNS server misconfigured
- Stale DNS cache entries
- Hostname cannot be resolved
Mastering SFC and DISM: The Complete System Repair Guide
An in-depth encyclopedia on successfully repairing corrupted Windows image files and system components using SFC and DISM command line tools.
Read the full guide →Step-by-Step Solutions
- Open Command Prompt as Administrator
- Run: ipconfig /flushdns
- Change DNS to Google (8.8.8.8) or Cloudflare (1.1.1.1)
- Run: ipconfig /registerdns
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 "*5018*" -or $_.Message -like "*ERROR_RESMON_ONLINE_FAILED*"} | 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