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WDS Boot PXE: Fix the 0xc0000001 Error

9

Symptom

When you try to start a computer in PXE from a WDS server, the following error is displayed when loading the image:

Windows failed to start. A recent hardware or software change might be the cause. To fix the problem:
1. Insert your Windows installation disc and restart your computer.
2. Choose your language settings, and then click “Next.”
3. Click “Repair your computer.”
if you do not have this disc, contact your system administrator or computer manufacturer for assistance.
Status: 0xc000000l
Info: A required device isn’t connected or can’t be accessed

pxe error wds

The problem appears after you install the March 2019 updates (KB4489883 or KB4489891).

Resolution

The maximum block size of the TFTP server must be changed.

1. Open the WDS console, right click on the server 1 then click on Properties 2 .

2. Go to the TFTP 1 tab, block size enter 4096 2 . Uncheck Enable Variable Window Expansion 3 and click Apply 4 and OK 5 .
TFTP config

3. Restart the WDS service. Right click on server 1 / All tasks 2 / Restart 3 .
Restart service

 



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  1. km

    Worked! wds on server 2012 r2

    thanks

  2. Gaz

    This looks specific to windows 2012. I have this issue on 2016 and this fix hasnt worked. I do not have these updates installed.

    • Romain

      Hello, have you tried with a larger value?

  3. Frank

    You saved my day!

  4. Daniel Ruiz

    Worked for me! Thanks.
    I think that was a windows update problem because 1 moth ago worked correctly.

  5. vinod

    It fixed the issue on my server. Thanks for sharing!

  6. Ben Guptill

    After years of running MDT with no problem suddenly my PXE boots started failing with the error shown in your Symptom section. I was out of ideas until I ran across this. It fixed the issue on 2 different servers I was having the issue on. Thanks for sharing!

    • Romain

      Hello,
      I found myself in the same situation, years of use without problems. I think the problem comes from a recently installed update
      Romain.

      • Sjoerd

        I can confirm, the latest Windows update was the problem for me also. After uninstalling the update, the error was gone and MDT started as it used to.

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