grub fails to boot after Windows upgrade -
i have multi-boot machine ubuntu 14 partition, ubuntu 16 partition , windows partition (probably windows 10). hadn't used windows in on year , after rebooting, forced me windows updates. after that, machine won't reboot. grub rescue prompt. error message is
error: no such partition
what should do?
to mount in grub rescure : if hd0 file sytem try 0 in general s default.
set root=(hd0,0) set prefix=(hd0,0)/boot/grub insmod normal normal
try after "can" if no : reboot
sudo update-grub sudo grub-install /dev/sda //if doesn't work try sdb ...
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