@echo off
set IMAGE=%SystemDrive%\TEMP\IMAGE
set BOOT=%SystemDrive%\TEMP\BOOT

echo unmounting image and discarding changes ...
dism /Unmount-Wim /MountDir:%IMAGE% /Discard

echo.
echo unmounting boot and discarding changes ...
dism /Unmount-Wim /MountDir:%BOOT% /Discard

echo cleaning up ...
dism /Cleanup-Wim 
dism /Cleanup-Mountpoints

echo showing status ...
dism /Get-MountedWimInfo