Error: (08/10/2014 06:00:29 PM) (Source: Ntfs) (EventID: 131) (User: NT AUTHORITY) Description: The file system structure on volume C: cannot be corrected. Please run the chkdsk utility on the volume C:.
You have several of these errors, you will need to run [b]chkdsk /r[/b]

http://www.howtogeek.com/howto/windows-vista/guide-to-using-check-disk-in-windows-vista/