I removed Windows 10 x64 (1809)'s 16MB reserved partition located just before the installation partition (which I then resized to be 84MB smaller, with the 84MB unallocated space at the beginning) and increased the SSD's EFI partition, which was located just before the reserved partition, by 100MB (by adding these 16MB+64MB).
I also kind of destroyed the EFI folder on the EFI partiton by accidentally replacing the entirety of its contents with other ones (I actually wanted to add the latter, not replace existing ones), so I no longer have the Windows bootloader.
I installed Ubuntu after all this happened and, sadly, not even GRUB sees my Windows installation..
I'd really appreciate some hints on how to regain access to my Windows installation.
Some things I tried so far (I ran them from a Windows 8.1 Installation DVD, since I didn't seem to have a working Windows 10 DVD):
- The commands
bootrec /ScanOs
bootrec /RebuildBcd
Both detected 0 Windows installations.
- The command
bcdboot c:\Windows /l en-us /s x: /f ALLgave me the error 'Failure when attempting to copy boot files.'
EDIT: I also posted the question on these websites, but have not received an answer yet:
https://www.tenforums.com/general-support/125036-cant-boot-windows-10-after-messing-reserved-installation-partitions.html#post1552350
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