I'm in the same situation, Getting very frustrated with it. I've removed the latest version of Wintoolkit, no difference then remove DISM which it updated the other day. Reinstalled WTK 1.4.46.1 to a new location & moved the wintoolkit temp folder. I thought it was maybe my most recent image that was causing it so used the original untouched Win7 ISO & didnt make any changes to it, just clicked start to redo it & it still says 'Win Toolkit was unable to mount an image!' I've tried clicking on save to clipboard & text file but it says wintoolkit has stopped responding & I have to end task. It does go through the sequence of rebuilding the image but doesn't make any changes to it. Below is what it I copied & pasted from the error log. looks the same as the log file above. StartingOutput: ImageX Tool for WindowsOutput: Copyright © Microsoft Corp. All rights reserved.Output: Version: 6.2.9200.16384Output: ERROR: Unable to use specified log file.Output: Mounting: [D:\Wintoolkit\May\sources\install.wim, 7] -> [C:\WinToolkit_Mount]...Output: [ 0% ] Mounting progress Output #1: [ 0% ] Mounting progress Output #2: [ 0% ] Mounting progress Output #3: [ 0% ]Output #4: Writing Status T: [ 0% ] | PT: Done StatusWriting TaskbarDone TaskbarOutput: Error mounting image.Output: The system cannot find the path specified. Finished