So you have windows 10 installed and you are enabling the "Get Insider preview builds"???
Check your C drive for $windows ~bt\Sources\install.esd
IF it's there download ESDtoISO https://onedrive.live.com/?authkey=...05852D5563AD391!13344&cid=905852D5563AD391and build your own ISO, then just double click it to mount it and run setup.exe to do the upgrade in place.
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