It is probably a damage in your Hard Disk's File System.
Please try to perform a chkdsk (Check Disk) on the Hard Disk that contains the files:
- Windows Key + R
- Type "cmd" without quotes, to open command console
- Inside the command console type "chkdsk C: /f" (without the quotes) and press enter
- Windows will probably prompt you to restart your PC in order to perform the Check Disk procedure before Windows OS is loaded.
- After it finished it will continue loading Windows. Check now if the problem solved.
Note: In case you have the files on another Hard Disk or Partition with different letter than "C:", replace it according to that Hard Disk or Partition drive letter.