Missing Boot and Install WIM Files | Generated by AI
Question: USB does not contain boot.wim and install.wim — what does it mean?
Answer:
This is a very important clue.
A normal Windows 11 installation USB must have:
\sources\boot.wim
\sources\install.wim
or:
\sources\boot.wim
\sources\install.swm
\sources\install2.swm
boot.wim is required because it contains Windows PE (the installer environment).
install.wim / install.swm contains the actual Windows image.
If both are missing, your USB is not a valid Windows installation media.
Given your previous steps on Mac:
- FAT32 format
- manually copying ISO files
- splitting WIM because FAT32 has 4GB limit
The likely mistake is:
You copied files but forgot the sources directory contents, or the split WIM operation did not create the .swm files correctly.
Check USB structure:
dir D:\
You should see something like:
boot
efi
sources
support
setup.exe
Then:
dir D:\sources
Expected:
boot.wim
install.swm
install2.swm
...
Fix: recreate USB from Mac
Mount ISO:
hdiutil attach Win11_25H2_English_x64_v2.iso
Assume:
ISO:
/Volumes/CCCOMA_X64FRE_EN-US_DV9
USB:
/Volumes/WIN11
Copy everything except install.wim:
rsync -avh \
--exclude=sources/install.wim \
/Volumes/CCCOMA_X64FRE_EN-US_DV9/ \
/Volumes/WIN11/
Install wimlib:
brew install wimlib
Split:
wimlib-imagex split \
/Volumes/CCCOMA_X64FRE_EN-US_DV9/sources/install.wim \
/Volumes/WIN11/sources/install.swm \
3800
After this:
ls /Volumes/WIN11/sources/
should show:
boot.wim
install.swm
install2.swm
Then eject:
diskutil eject /Volumes/WIN11
Boot Lenovo from USB again.
Your current failure:
0xC19001F4
makes much more sense now. Setup starts because boot.wim was probably loaded somehow, but the installation image/settings stage is broken.
First verify:
dir D:\sources\boot.wim
because if boot.wim is also missing, the USB creation is definitely wrong.
Generated by AI. Curating and sharing still takes effort.
If you find it useful, feel free to
donate.
WeChat: @lzwjava
·
X: @lzwjava ·
Say hi 👋