Restore Registry from Backup: Press Win+R, type rstrui.exe, press Enter
👇 See all 2 solutions belowWhat is Error 1169?
Windows System Error Code 1169, known as ERROR_SET_NOT_FOUND, is a Configuration error that occurs during system configuration and registry. The error indicates that: There was no match for the specified key in the index. When this error is encountered, the Windows operating system was unable to complete the requested operation within the configuration management subsystem. The error code 1169 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_SET_NOT_FOUND 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: There was no match for the specified key in the index.
- Registry entries are corrupted
- Config files are missing or malformed
- A recent update changed system settings
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Read the full guide →Step-by-Step Solutions
- Press Win+R, type rstrui.exe, press Enter
- Select a restore point before Error 1169 (ERROR_SET_NOT_FOUND) started
- Follow the wizard to restore system configuration
- Restart your computer
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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 "*1169*" -or $_.Message -like "*ERROR_SET_NOT_FOUND*"} | 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