For Windows 10: force your PC to restart 3 times, so automatic repair will kick in, then allow it to do the repairs. After this it should work.
For other Windows versions follow the video or the text below:
1. Restart Windows install
2. Delete the partition on which you want to install Windows (backup data first if you have important informations on it)
3. Create a new partition
4. Format the partition
5. Leave all Windows settings on default (you can change them in Windows later)
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