Phöbus

@Phöbus
After a new test, I see that the folders "WinToolkit_Temp\Mount" are created now using WinToolkit !
When the image is successfully commited the temp folder "Mount" is removed and all works fine. And when we exit WinToolkit the temp folder "WinToolkit_Temp" is removed.
It seems the trouble is the "Mount" folder wasn't empty in this case.
Here is my result test (Logs\Mount Logs):


[4452] [ INFO ] Mounting new image.
Wim: [C:\Win7_SP1\sources\install.wim]
Image Index: [5]
Mount Path: [C:\WinToolkit_Temp\Mount]
[4452] [ INFO ] Wimserv process started for guid e433dace-d32e-46a6-97bd-5c87907a0ad7. Id is 4852
[4852] [ INFO ] ImageUnmarshallHandle: Reconstituting wim at C:\Win7_SP1\sources\install.wim.
[4852] [ INFO ] Mounted image at C:\WinToolkit_Temp\Mount.
[4852] [ INFO ] Received unmount request for image with guid e433dace-d32e-46a6-97bd-5c87907a0ad7.
[4852] [ INFO ] Unmount for image at C:\WinToolkit_Temp\Mount complete.

*Edit:
You can try to do like this:
Exit WinToolkit
Browse to the folder WinToolkit_Temp\Mount if exists
Select the folder and use on your keyboard "Shift + Del" to remove this one
Go to the registry and look at this key:
HKLM\SOFTWARE\Microsoft\WIMMount\Mounted Images
Remove this key
Try again to launch WinToolkit and the temp folders will be created a new time.

The folder: "C:\WinToolkit_Temp" doesn't exist.
Create the folder first manually!
Cheers