Dual OS: Windows 10 Pre-installed | Ubuntu 2nd with GRUB Boot
grub won't install ?
grub failed install?
Can't install ubuntu?
USB ... F12, with UEFI or ...?
## maybe i'm wrong, but my OK
disk: gpt partition table.
dual boot: yes, with EFI partition(fat32).
install with USB, F12 and ... UEFI line.. and install.
##
after install new os, if grub screen menu boot not show, try open BIOS, and select 1st is ubuntu.
reboot to boot ubuntu
and inside ubuntu run terminal with command:
$sudo update-grub
you can see name of os added to grub menu boot.
##
This: demo with install ubuntu os as 2nd os
windows installed, 1st.
disk is msdos partition table(created when windows installed)
##
MY Rule Install:
F12 to boot install
if your disk is msdos then select line-menu no "UEFI".
if your disk is gpt then select line-menu have UEFI.
##
in bios, check UEFI boot or Legacy only, if Both is ok.
if Legacy boot then your disk should is msdos PT
if UEFI boot then your disk should is gpt PT
##
msdos = max 4 primary partition + unlimited logical partiton
(inside extend partiton), no EFI partition.
##
gpt = all are primary, no logical, have EFI partition(store boot).
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