Sorry OldPhil. I don't understand your question clearly. I'll mention two things which may have to do with your theme.
As soon as you install the OS you can go to Control Panel, System and Security, Backup and Restore. I am assumimg you partitioned your disk. Create an image of your system (top left in the backup and restore screen) and place it in any other partition where there is no OS. Or, even better, in an external HDD if you have one.
Also, in the middle of that same page there is a item named "Backup Now". Follow the instructions, place your backup again, if possible, on a external HDD. Once a week scheduled backups is OK,
You can also create a repair disk. Is you need to enter a Repair Environment you can return to your original position by using System Image or by choosing System Restore.
The latter one will be more actual since you scheduled it to run once a week. Some programs, especially if they meddle with the registry, will create restore points by themselves. Also when you uninstall programs.
Finally, you can download a free backupper, like Aomei, and put your backup somewhere except C: And create a Aomei Backup Rescue Disk, which is bootable. Before feeling like wanting to destroy your computer, boot with the Aomei disk and, following the instructions, you can surf straight to the Aomei backup of your choice and you're back in business.