When I try to update my virtual machine from Win7 to Win10 the procedure goes well until during one of the "startups" to deal with updates, this message appears. "The system registry contains invalid file paths. Installation cannot proceed. The system image was applied without guaranteeing that drive letter assignments would match acros computers." At that point the process aborts and reverts back to Windows 7. I've tried a restart and redo withouth success. -SEM