Windows update broke my grub

I don’t know where to put this and I am sure others have had this issue.
After Windows did an update I was left at this prompt:
ERROR: Unknown filesystem
Entering Rescue Mode . . .
Grub Rescue>_

Not to panic at this point.

I entered this command and rebooted and all was well:

 grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=manjaro --recheck
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Can you post fdisk -l on console ?