Don't worry about the camera noise.
I had multiple Linux distro installed beside windows 10 and after deleting their partitions and deleting those folders from the EFI fat32 System partition I ran those commands as seen above.
Its perhaps also important that grub was installed and removed as above described.
Issue is that, for both ScanOS and rebuildbcd it says
Search for Windows Installations was successful,
Total identifiable Windows Installations: 0
The process was successful. (translated)
As side-context: I can boot into Windows 10 properly (perhaps slow) but when I do stuff with Linux or older Windows bootable drives I get an boot error for "/Boot/Bcd". There's definitely an issue with bcd, regardless whether I can boot.
This is what my...
... Partition :
(Ignore the Win7 partition, nothing on it)
("Fehlerfrei" means healthy/no issues, "Versteckt" at the end means hidden)