Restore Registry from Backup: Press Win+R, type rstrui.exe, press Enter
👇 See all 2 solutions belowWhat is Error 1109?
Windows System Error Code 1109, known as ERROR_MEDIA_CHANGED, is a Configuration error that occurs during system configuration and registry. The error indicates that: Unable to unload the media. When this error is encountered, the Windows operating system was unable to complete the requested operation within the configuration management subsystem. The error code 1109 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_MEDIA_CHANGED 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 system configuration and registry is essential for effective troubleshooting.
Common Causes
- System resource conflict: Unable to unload the media.
- Registry entries are corrupted
- Config files are missing or malformed
- A recent update changed system settings
Demystifying the Windows Registry: Safe Cleaning, Repair, and Backup
An encyclopedia on the core architecture of the Windows Registry, how to fix registry corruption errors, and why registry cleaners should be avoided.
Read the full guide →Step-by-Step Solutions
- Press Win+R, type rstrui.exe, press Enter
- Select a restore point before Error 1109 (ERROR_MEDIA_CHANGED) started
- Follow the wizard to restore system configuration
- Restart your computer
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 "*1109*" -or $_.Message -like "*ERROR_MEDIA_CHANGED*"} | Format-List💡 Open PowerShell as Administrator, paste the command above, and press Enter.
Prevention Tips
- Back up registry before editing
- Use built-in tools, not manual edits
- Document all system configuration changes