Re: 'error: invalid signature' when booting Windows 10

[Pascal Hambourg]

Le 12/12/2018 à 18:21, David Collier a écrit :
> > here is information collected using gdisk:
>
> https://pastebin.com/WnJE0jdY

I expecte a bit more description of the partitions. There are many disks 
and Windows and Linux partitions, so if there are multiple systems 
installed it would be helpful to know which partitions belong to which 
system.

For now, I can see that sda has a "BIOS boot" partition and its #3 
partition type is Linux filesystem, so it is likely that GRUB is 
installed in its MBR. I can see only one "EFI system" partition as 
/dev/sdb3, so I guess this is the one referenced in your GRUB script.

First I would search instances of GRUB EFI in this EFI partition.