chkdsk C: /f — This finds and logical errors in the file system.

chkdsk C: /r — This is the "deep dive." It does everything /f does but also searches for (physical damage) and tries to rescue any readable data from them. Why the Change? chkdsk - Microsoft Learn

To :

Using these steps and understanding the options available can help you maintain the health of your disks in Windows 11.

If the drive is in use (e.g., C: ), you’ll be prompted to schedule the scan at the next system restart. Type Y and reboot.

If you need to check the system disk (usually C: ), you might need to schedule the check for the next reboot because Windows can't check the system disk while it's in use.