I have a 250GB drive on GPT. There are three partitions, boot, root,home for Ubuntu. I have recently had to add Windows 10, so I partitioned home and opened up about 60GB for Windows 10.
I did (try to do ) a USB install (following this guide, https://www.youtube.com/watch?v=o4ilMAAk1Q8) where I carved out a 8GB partition and copied the installer files. The expectation was that once you reboot, the rest of the installation process continues and you are able to complete Windows 10 installation.
When I rebooted, my GRUB had no idea that it has to reboot into Windows, of course. So I got into Ubuntu and updated grub with the Windows 10 information. When I rebooted again, GRUB showed a Windows 10 Recovery System but was unable to boot into Windows 10 Installer (remember, I am still installing Windows 10). To solve this problem, I manually tried to load bootmgr.efi and bootx64.efi, but was unsuccessful. I am not sure what should be done to boot into Windows installer and complete the installation. Any help would be appreciated! Thank you!
Trying with bootmgr.efi
