How to fix error error-sector-not-found in Windows 11

Solution Steps

1. 1 Back up your data immediately if possible. Copy important files to another drive or cloud storage. This is crucial because bad sectors can spread and lead to total data loss.
2. 2 Run a disk check to identify and mark bad sectors. Open Command Prompt as administrator (Windows key + R, type 'cmd', press Ctrl+Shift+Enter). Type 'chkdsk C: /f /r' (replace C: with the drive letter) and press Enter. The /r flag locates bad sectors and recovers readable information. You may need to restart your computer to run the scan.
3. 3 If chkdsk finds bad sectors, it will mark them so Windows avoids them in the future. However, this is a temporary fix; the drive is failing. Monitor the drive's health using tools like CrystalDiskInfo (free download) to check S.M.A.R.T. status.
4. 4 If the error occurs on a non-system drive, you can also use the 'Error Checking' tool in File Explorer. Right-click the drive, select Properties, go to the Tools tab, and click 'Check' under Error checking. Follow the prompts.
5. 5 If the drive is severely damaged, consider replacing it. Clone the drive to a new one using software like Macrium Reflect or use Windows' built-in backup and restore to migrate your system.