That appears to be a problem with your hard disk.
Do the following:
1. Click Start
2. In the search box, type cmd
3. In the list that appears, right-click on cmd.exe and choose Run as administrator
4. In the command window that opens, type chkdsk /R
and hit enter.
You will be prompted whether you wish to schedule and disk check at next startup, choose YES, then reboot your PC. Make a note of the chkdsk that occurs at boot and post the details back here.
Install and run CrystalDiskInfo
- take a screencapture image of what the program reports for your C: and post it here.