My cousin restarted to this message on his PC, so we investigated on the internet and found a solution to pop in the Windows(8) install disc and go to "Repair Windows". After that, we went to the command prompt and typed many different types of "chkdsk". We tried "chkdsk C: f/", "chkdsk", "chkdsk C: /f /r /x" etc... All of these resulted in a message saying "Windows cannot run disk checking on this volume because it is write protected." We are both clueless as to what to do from here. Any help is much appreciated!