You can manually set up one operating system only, make an image of system, and then set up it on all other PCs, save your time and costs. If you want to recover only certain files from a disk image, you can connect that image as a virtual HDD and copy those files instantly from the disk image using Windows Explorer or any other file utility.
It is highly recommended that the operating system partition that is backed up remains unchanged during the process. If you or your system modifies contents of the HD while Handy Backup software tries to back it up, then the operation may fail. The best case is when you boot from a various hard disk drive or disk partition and add image of the first system drive to the backup job.
Handy Backup by Novosoft is one of the greatest Toshiba external hard drive backup software
and disaster restore solutions to prevent losing your files after fatal Windows crash.