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I tried it but still the same blue screen. For some reason I don't have the option "place the boot flag on", but I added the boot flag on the efi fat32 partition with GParted
– Joseph Chataignon
Commented Feb 10, 2021 at 15:51
Does your computer use EFI, and is the disk formatted as MBR or GPT? Do you have a Windows installation media?
– harrymc
Commented Feb 10, 2021 at 16:25
The disk is formatted as GPT, I'm not sure about EFI but I have an option about UEFI in the GRUB booting menu. I don't have a Windows installation media (I tried to create one but it didn't work, I might retry).
– Joseph Chataignon
Commented Feb 10, 2021 at 16:53
Try perhaps Rescatux. You can create it from Linux.
– harrymc
Commented Feb 10, 2021 at 16:57
I tried the following options from Rescatux, unsuccessfully: File system check: - sda1 (windows efi): OK - sda2 (windows reserved partition 16 Mo, no filesystem): ERROR filesystem check with automatic fix failed - sda3 (windows OS): OK - sda4 (recovery, I guess? ntfs 875Mo): OK Reinstall Microsoft Windows UEFI: - WARNING: backup of EFI directory went wrong - ERROR: the reinstallation of Windows UEFI boot entries went wrong
– Joseph Chataignon
Commented Feb 11, 2021 at 6:55

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