GRUB doesn't show Windows 10

Solution 1:

First I tried with sudo os-prober and sudo update-grub and it didn't recognize my windows.

Finally I solved this problem following steps of Boot-Repair

Install boot-repair

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair && boot-repair

Push "Recommended repair" And put in a terminal some commands as it suggested.

I think my Grub doesn't recognize windows due to a bad shutdown, and it solved the problem.

I hope this help you.