How to remove a line in grub?

Hello,

You need to tell

os-prober

to ignore certain partitions (specifically, the one associated with the invalid Windows entry) by using the

GRUB_OS_PROBER_SKIP_LIST

option (see this discussion). In your case, you need to filter out the device that contains the "invalid" Windows.

Another, more radical solution: delete the said partition if you don’t need it, and then run

sudo update-grub

.

Good luck.

Thank you, mamiemando.
But the first solution you proposed is too technical for me.
For the second one, how do we delete a partition and how do we know which one?
Here's a screenshot of Gparted, I don't see any partition to delete.

Good evening,

I have the solution, just install GrubCustomizer.

Very simple, just install it.
Once launched, it displays all the lines of the grub.
You can delete, move...
Really very simple

Thanks for your feedback, but I'm afraid you'll have to do it again at the next update of your kernel (which leads to a regeneration of grub).
I didn't know that. But as mentioned earlier, it's really easy to do.