You can also type “ chkdsk /scan” to scan the disk online and attempt to repair it. Now, type “ chkdsk c: /x /r“, without the quotes, to dismount the drive, scan it for errors, and repair it.The next screen to appear is a User Account Control (UAC) window which will ask for permission to launch the Windows Command Processor and let it make changes to the PC.Right-click the Start menu and select, Windows PowerShell (Admin).
