Syntax Displays or modifies the checking of disk at boot time. CHKNTFS volume [...]
CHKNTFS /D
CHKNTFS /T[:time]
CHKNTFS /X volume [...]
CHKNTFS /C volume [...]
| volume | Specifies the drive letter (followed by a colon), mount point, or volume name. |
| /D | Restores the machine to the default behavior; all drives are checked at boot time and chkdsk is run on those that are dirty. |
| /T:time | Changes the AUTOCHK initiation count down time to the specified amount of time in seconds. If time is not specified, displays the current setting. |
| /X | Excludes a drive from the default boot-time check. Excluded drives are not accumulated between command invocations. |
| /C | Schedules a drive to be checked at boot time; chkdsk will run if the drive is dirty. |
If no switches are specified, CHKNTFS will display if the specified drive is dirty or scheduled to be checked on next reboot. Examples chkntfs /d Restores the computer back to the default settings and all drives are checked at boot if they are dirty. | 
