Thank you for taking the time to report this bug and helping to make Ubuntu better.
AMD64 is your architecture, and applies to both AMD x86_64 and Intel x86_64 processors, it's called AMD64 because AMD was first with 64-bit x86, including by both microsoft & intel.
Your problem is that grub failed to install; grub being the GNU bootloader used by Ubuntu (and many other systems). Why it failed to install I can't help with sorry, but I've had your issue personally because of security settings in bios/uefi but this may not be your issue.
Thank you for taking the time to report this bug and helping to make Ubuntu better.
AMD64 is your architecture, and applies to both AMD x86_64 and Intel x86_64 processors, it's called AMD64 because AMD was first with 64-bit x86, including by both microsoft & intel.
Your problem is that grub failed to install; grub being the GNU bootloader used by Ubuntu (and many other systems). Why it failed to install I can't help with sorry, but I've had your issue personally because of security settings in bios/uefi but this may not be your issue.
You may find help with your problem in the support forum of your local Ubuntu community http:// loco.ubuntu. com/ or asking at https:/ /askubuntu. com or https:/ /ubuntuforums. org.