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I had a dual boot system with ubuntu and win10 but tonight windows attempted an update which has messed it up and left me in grub rescue.

I am complete novice in Linux and I cant boot from usb otherwise would just reinstall

Forr3s
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  • See my answer at https://askubuntu.com/questions/961387/grub-fails-to-boot-after-windows-upgrade/961419#961419 – heynnema May 20 '18 at 13:39

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You have to put an Ubuntu ISO onto a USB stick and boot from that. After loading the live version of Ubuntu you'll have to chroot into your system and update-grup. Grub will find all your partitions, both Windows and Linux, and you'll be able to choose at boot time again.

Checkout this Ubuntu Help Page for Grub Recovery.

Socrates
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