Options now are:
a) Have Windows backup files and install a fresh version of Windows
b) Manually backup files and install a fresh version of Windows


Going forward consider:
a) making free or pay backup images and saving the images to another disk drive or the cloud
b) using regback
c) manually backing up the registry



One or more of these links may be useful:

Enable Automatic Backup of System Registry when Restart in Windows 10

Custom Install Windows 10

Clean Install Windows 10

Backup and Restore with Macrium Reflect

Download Windows 10 ISO File

https://www.microsoft.com/en-us/soft...d/windows10ISO

https://support.microsoft.com/en-us/...9-d428a2ab0692