I am trying to reformat a hard drive for a friend, but during the initial reformatting, explorer crashed, interrupting the process. After that, every time I have tried to reformat I get the "Windows was unable to complete the format." error message. I downloaded the reformatting software on http://download.chip.eu/en/USB-Disk-Storage-Format-Tool_176935.html and it still does not seem to work. Any ideas how I can this thing to work?