Lenovo ThinkPad L15 Gen 4 - WDS image error when start image settings on the laptop

Question

Hello!

There are about 70 pieces "Lenovo ThinkPad L15 Gen 4" laptops. 10 pieces of these machines have not been able to load a network image for some time, because the response file shown in the image throws an error, even if there is no response file specified for the image.

Error message: "Windows could not parse or process the unattend answer file for pass [specialize]. The settings specified in the answer file cannot be applied. The error was detected while processing settings for component [Microsoft-Windows-Shell-Setup]"

What I tried and it doesn't work:

• No matter where I install the machines
• No matter what network image (Win10, Win11)
• It doesn't matter if there is an answer file or if it's good or bad (there used to be a Fuji series that only loaded the image with the wrong response file, otherwise it ran to the same error)
• The images upload well to many other machines (answer files too)
• Deleting AD account didn't help
• BIOS update doesn't help either
• BIOS Factory reset doesn't do anything (under Security tab) (Intel ME, Frimware recovery...)
• A long time ago (1 year), these machines were also installed from a network image
• Secure boot enabled/disabled doesn't matter
• There is a problem only with network image installation, and only with these 10 machines out of the approx. 70 that I installed (USB installation is fine)
• I installed one with basic Windows from a USB and installed Lenovo Update, which I used to update everything, but even after that the network image installation did not work on the particular machine.

I can think of another Intel problem (Intel ME, etc.) - although that's the problem, it doesn't matter, because sometimes the same thing is not good, and if it's different, there's still a problem

Has anyone encountered such a problem? What are you trying? Unfortunately, I'm running out of ideas.

Thanks in advance if anyone has any suggestions.

Balázs