Please try to make the following operations:
Check your disk:
- Open "My Computer", right click on your disk, "Properties", "Tools", "Check Now";
- Mark both check-boxes: "Automatically fix file system errors" and "Scan for and attempt recovery of bad sectors";
- In the opened window press the button "Yes";
- Reboot computer.
- After reloading, In command line ("Start", "Run", "cmd") type: "chkdsk C: /F" /R;
- Select "Yes".
After that please try to make operation.