C:\WINDOWS>HELP CHDIR
Displays the name of or changes the current directory.

CHDIR [/D] [drive:][path]
CHDIR [..]
CD [/D] [drive:][path]
CD [..]

 ..   Specifies that you want to change to the parent directory.

Type CD drive: to display the current directory in the specified drive.
Type CD without parameters to display the current drive and directory.

Use the /D switch to change current drive in addition to changing current
directory for a drive.

If Command Extensions are enabled CHDIR changes as follows:

The current directory string is converted to use the same case as
the on disk names.  So CD C:\TEMP would actually set the current
directory to C:\Temp if that is the case on disk.

CHDIR command does not treat spaces as delimiters, so it is possible to
CD into a subdirectory name that contains a space without surrounding
the name with quotes.  For example:

   cd \winnt\profiles\username\programs\start menu

is the same as:

   cd "\winnt\profiles\username\programs\start menu"

which is what you would have to type if extensions were disabled.



C:\WINDOWS>HELP CHKDSK
Checks a disk and displays a status report.


CHKDSK [volume[[path]filename]]] [/F] [/V] [/R] [/X] [/I] [/C] [/L[:size]]


 volume          Specifies the drive letter (followed by a colon),
                 mount point, or volume name.
 filename        FAT/FAT32 only: Specifies the files to check for
fragmentation.
 /F              Fixes errors on the disk.
 /V              On FAT/FAT32: Displays the full path and name of every file
                 on the disk.
                 On NTFS: Displays cleanup messages if any.
 /R              Locates bad sectors and recovers readable information
                 (implies /F).
 /L:size         NTFS only:  Changes the log file size to the specified number
                 of kilobytes.  If size is not specified, displays current
                 size.
 /X              Forces the volume to dismount first if necessary.
                 All opened handles to the volume would then be invalid
                 (implies /F).
 /I              NTFS only: Performs a less vigorous check of index entries.
 /C              NTFS only: Skips checking of cycles within the folder
                 structure.

The /I or /C switch reduces the amount of time required to run Chkdsk by
skipping certain checks of the volume.



C:\WINDOWS>HELP CHKNTFS
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 countdown 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.