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Since I have installed Ubuntu on my USB I cannot find Windows in GRUB or in BIOS any more. I tried to command in terminal

sudo update-grub

but it fails. This error comes:

/usr/sbin/grub-probe: error: failed to get canonical path of `/cow'.

Can anyone help me to bring Windows back?

marked as duplicate by Byte Commander, mikewhatever, karel, Zanna, Fabby Apr 19 '18 at 15:48

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