btw. I´m not sure about this but I think that it should be also advised people to (at least with windows) take off all the usb device off except mouse/keyboard, also usb hubs and reboot computer and disable/exit any Nokia software and also Av-software. And after then try the usb flash program with given guides.

This is for me just common sense when dealing with these kind of stuff, but not for everybody and I think that this kind of methods probably at least take away some factors where there can be errors/bugs/compatibility issues.