My problem solved. My mistake was skipping a step at rebuilding the ISO: - I did not click "next" button to open a new window where a path/file-name of the to-be-created ISO must be assigned/defined (as the "next" button was not "highlighted", looked like a "dead" button). The omission of this step caused unable to "access/write" thus problem occurred. Incidentally, I also learned that those installed features, like .net framework and others, can be turned on/off. Control Panel > Programs and Features > Turn windows features on or off (this option is located on the left panel) I did turn on the .net framework 3.5, but I am not sure that had help in dissolving my problem.