Open the Start menu
Type Command Prompt
Right-click Command Prompt and select Run as administrator
Type `chkdsk C:`
Press Enter
To fix errors, type `chkdsk C: /f`
To scan for bad sectors and recover readable data, type `chkdsk C: /r`
If prompted to schedule the scan on restart, type `Y`
Restart the computer
Wait for CHKDSK to complete before logging in
Replace `C:` with the drive letter you want to check