undoing chkdsk


Richard Urban

When you run chkdsk with the /f or /r option - it is a done deal.

To undo it, recover an image you created before you ran chkdsk (True Image,
Ghost etc, can make these images).


Richard Urban
Microsoft MVP Windows Shell/User

Quote from George Ankner:
If you knew as much as you think you know,
You would realize that you don't know what you thought you knew!


I was doing cleanup and one drive was performing a function so scandisk
could not check it, so I responded yes if I wanted to scan at startup.
I did not reliaze it was an option that I can't figure out how to undo.

It goes through the check and never finds anything, it only slows down
my startup and I simply want to undo.


Wesley Vogel

Check Disk runs on every boot.

Open a command prompt...
Start | Run | Type: cmd | Click OK |
Type or paste the following line:

chkntfs /d

Hit the Enter key.

The /d switch restores the machine to the default behavior; all drives are
checked at boot time and chkdsk is run on those that are dirty.

Autochk.exe is a version of Chkdsk that runs only before Windows XP
starts. Autochk runs in the following situations:

Autochk runs if you try to run Chkdsk on the boot volume.
Autochk runs if Chkdsk cannot gain exclusive use of the volume.
Autochk runs if the volume is flagged as dirty.

This can happen if the drive's dirty bit is set.
When a drive's dirty bit is set, autochk automatically
checks the volume for errors the next time the computer is restarted.

This will report whether the dirty bit is set.

Start | Run | Type: cmd | Click OK |
Type or paste the following line:

fsutil dirty query C:

Hit the Enter key.

Volume C: is not dirty
Volume C: is dirty

[[If a volume's dirty bit is set, this indicates that the file system may be
in an inconsistent state. The dirty bit can be set because the volume is
online and has outstanding changes, because changes were made to the volume
and the computer shutdown before the changes were committed to disk, or
because corruption was detected on the volume. If the dirty bit is set when
the computer restarts, chkdsk runs to verify the consistency of the volume.

Every time Windows XP starts, Autochk.exe is called by the Kernel to scan
all volumes to check if the volume dirty bit is set. If the dirty bit is
set, autochk performs an immediate chkdsk /f on that volume. Chkdsk /f
verifies file system integrity and attempts to fix any problems with the

This will also report whether the dirty bit is set.

Start | Run | Type: cmd | Click OK |
Type or paste the following line:

chkntfs c:

Hit the Enter key.

C: is not dirty.

If this is not the problem.....

Go here:

Read the instructions at the top of the page.
Scroll down to:
82. Disable or Enable Check Disk Upon Boot
Click on Disable.

Additional information...
Chkdsk.exe or Autochk.exe starts when you try to shut down or restart your

Hope this helps. Let us know.

MS-MVP Windows Shell/User


Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments. After that, you can post your question and our members will help you out.

Ask a Question