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#11
When performing a clean install all partitions are deleted and the drive is unallocated.
The Windows 1511 is deleted.
If a Windows 10 iso with build 1803 is used the only installation that will work will be 1803.
So any problems that had existed with partitions, or drivers, or users, etc. are automatically fixed.
After the installation of Windows 1803 updates can be performed.