If you want to upgrade:
1. Go into "C:\Windows\SoftwareDistribution\Download" and delete everything in that folder.
2. Now, run the command prompt as an administrator. Type in "wuauclt.exe /updatenow" and enter, then ...
3. Go to your Control Panel > Windows Update and your Windows 10 should start re-downloading from scratch, hopefully without flaws this time.
This is from reddit and it works, it's legit, but i think it only updates the system and you can't do a clean install if you want to.