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#11
Oops, sorry. I know better than that.
Maybe startup repair? Run Startup Repair in Windows 10
Why can't you do a clean install?
Clean Install Windows 10
If that is literally true, that isn't what you need. You need a USB drive with the contents of the ISO copied onto it.
For a non-UEFI PC, you'd also have to prepare the USB as bootable.
Create Bootable USB Flash Drive to Install Windows 10