IT Professional of too many years here - getting to this thread a bit late.
But as Toby is already giving you all the right information I can sit back and let y'all carry on.
And by the way the CHKDSK syntax is CHKDSK /F /R
The F and R switches imply each other but slap them both on just to be safe. Also I believe the command has been updated and given some more options under Windows 10. But as Windows 10 is best avoided for now that point is moot.
But as Toby is already giving you all the right information I can sit back and let y'all carry on.
And by the way the CHKDSK syntax is CHKDSK /F /R
The F and R switches imply each other but slap them both on just to be safe. Also I believe the command has been updated and given some more options under Windows 10. But as Windows 10 is best avoided for now that point is moot.

