Clea install fro iso, not inplace or save files, but cppy your data; pic's, music, txt and othe important files first, usb thumb drive, externel or online storage first.
Burn the iso to dvd or usb thumb drive, make sure to use the proper bios format, legecy= mrb, uefi=gpt, otherwise the system will not be bootable; reason is the disk layout does not get reset from the old layout unles running diskpart and the clean command.
If 1709 is not updating, the issue could be factory restore images or even backup images.
If you have a spare drive, good option to clone the system drive incase of issues.
Before doing a clean install, remove-shut down any other drives before doing so, as win10 may try to use other drives to install part or all
of the new install to them.