Windows-To-Go creation tool (Wtgcreator.exe) does not recognise WIM file


The Windows-To-Go creator tool (Wtgcreator.exe) is responsible for imaging a Windows-To-Go USB drive with a Windows Image (WIM) file.

This WIM file may be:

  • Taken from a Windows 8.1 original ISO image
  • A customised WIM image created using Configuration Manager or the Microsoft Deployment Toolkit (MDT)

To use the tool you simply:

  • Plug in your certified USB device
  • Start the Windows-To-Go Wizard
  • Highlight your USB key and click Next
  • Click ‘Add Search Location’ and provide a directory where the WIM file lives
  • Select the correct WIM and begin the imaging process

The problem

When running through the Windows-To-Go creator wizard, no custom WIM files (even though they exist) are listed which prevents imaging.


Selecting a stock WIM file from the original ISO however works.

The Workaround

Use the DISM command to mount the WIM image to a temporary directory:

"DISM.exe /Mount-Wim /WimFile:C:\images\myimage.wim /index:1 /MountDir:C:\images\mount"

Close the WIM with the commit flag:

DISM.exe /Unmount-Wim /MountDir:C:\images\mount /commit

I don’t know why this works yet, but it does solve the immediate issue.

One interested thing to note is that the WIM file is now around 10MB larger.